This paper proposes a newly designed microstrip patch antennas (MSA) for wireless application
(CDMA Systems). The designed single antenna E-shaped patch antenna. Two parallel slots are in corporated
into the patch of a microstrip antenna to expand it bandwidth, and designed antenna operates in the frequency
range of 1.85 to 1.99 GHz. The antenna is designed using air as a dielectric substrate between the ground plane
and substrate patch antenna. IE3D is a full-wave electromagnetic simulator based on the method of moments
(MoM) technique. It has been widely used in the design of MICs, RFICs, patch antennas, wire antennas, and
other RF/wireless antennas. It can be used to calculate and plot the S parameters, VSWR, current distributions
as well as the radiation patterns. The results obtained for each patch were 2D and 3D view of patch, Directivity,
Gain, beam width and other such parameters, true and mapped 3D radiation pattern, and 2D polar radiation
pattern. The antenna successfully achieves the exhibit a broad impedance bandwidth of 27 % (at VSWR < 2)
with respect to the center frequency of 1.9 GHz is designed, fabricated, and finally measured on Spectrum
analyzer. The radiation pattern and directivity are also presented.. Gain maximum achievable is 3 dBi and good
return loss (S11 parameters) of -30 dB is achieved along with broadside radiation pattern.
DESIGN OF A COMPACT CIRCULAR MICROSTRIP PATCH ANTENNA FOR WLAN APPLICATIONS pijans
This paper presents the design of a compact circular microstrip patch antenna for WLAN applications which covers the band 5.15 to 5.825 GHz. The antenna is designed using 1.4mm thick FR-4 (lossy)substrate with relative permittivity 4.4 and a microstrip line feed is used. The radius of the circular patch is chosen as 7.62mm. To reduce the size and enhance the performance of the proposed antenna, a circular slot is loaded on circular patch and a square slot is etched on the ground plane of dimension 30mm×30mm. Design of the antenna is carried out using CST Microsoft Studio Sonimulation Software. The proposed antenna resonates at 5.5 GHz with a wider bandwidth of 702 MHz and it provides low return loss of -31.58 dB, good gain of 3.23 dB and directivity of 4.28 dBi and high efficiency of around 79% against the resonance frequency. The geometry of the proposed circular antenna with reduced size and its various performance parameters such as return loss, bandwidth, VSWR, gain, directivity, efficiency and radiation pattern plots are presented and discussed.
Design and Analysis of Triple-Band Multi Slotted Microstrip Patch AntennaIOSR Journals
In this paper, a multi slotted microstrip patch antenna design has been proposed. The characteristics
of the antenna are obtained in terms of return loss, gain and bandwidth. It is observed that the new proposed
configuration can operate in three different frequency bands with a good amount of bandwidth i.e. bandwidth of
21.12% at 1.1GHz frequency band, bandwidth of 11.65% at 2.11 GHz and bandwidth of 13.05% at 2.76GHz
frequency band . The resonating behavior in different frequency bands makes this antenna structure suitable for
different types of applications with an antenna gain of 6.163dBi and antenna efficiency of 86.82%.The substrate
material with relative permittivity of 4.2 and loss tangent of 0.0013 is used in this proposed antenna. The
designing and simulation of the antenna structure is done over IE3D simulation software version 15.02.
A compact triband microstrip antenna utilizing hexagonal CSRR for wireless co...journalBEEI
In this paper, a compact triband printed antenna with hexagonal complementary split-ring resonators (CSRRs) for 4G applications is proposed. The proposed multiband antenna is comprised of a rectangular patch antenna on the top plane, while on the ground plane, hexagonal CSRRs are etched for size miniaturization (at the lower bands) and multiband generation. Another effect of the CSRR is the shifting of the initial resonance of the patch antenna from 5.17 GHz to the higher band of 6.18 GHz. The triband of 180 MHz 2.4~2.59, 150 MHz 2.79~2.94 and 420 MHz 6.04~6.46 GHz bands acquired can cover WLAN/Wi-Fi and WiMAX operating bands adequately. This can be achieved by choosing the optimal size and position of the CSRR on the ground plane carefully. The design occupies a total size of 45 x 45 mm2 using the low-cost FR-4 substrate. Good agreements are obtained between the measured results and the simulated, which are discussed and presented.
E shape microstrip patch antenna design for wimax applications, international...Sk Sohag
This paper presents the design & simulation of E-shape microstrip patch antenna exhibiting wideband operating frequencies for various wireless applications. This antenna will provide the wide bandwidth which is required in various applications like remote sensing, biomedical application, mobile radio satellite, wireless communication etc. The coaxial feed or probe feed technique is used in the experiment. The performance of the designed antenna was analyzed in terms of bandwidth, gain, return loss, VSWR, and radiation pattern. The design is optimized to meet the best possible result. The proposed antenna is designed by air substrate which has a dielectric constant of 1.0006. The results show the wideband antenna is able to operate from 8.80 to 13.49 GHz frequency band with optimum frequency at 8.73 GHz.
In this paper, three novel designs of broadband patch antenna are proposed. The first design propose
broadband slotted equilateral triangular patch antenna (ETPA) operating on frequency around 1800 MHz.
The second design propose broadband slotted right angle isosceles triangular patch antenna RAITPA operating on frequency around 2400 MHz. The third design proposes wideband V-Slotted and shorted edge ETPA antenna operating on frequency around 2400 MHz. The two powerful software HFSS and IE3D are used to simulate the proposed designs. Very good agreement between HFSS and IE3D software is obtained. The designs were chosen to fit modern wireless communication applications operate at Industrial Scientific Medical (ISM) bands such as Wireless local area networks (WLAN). Moreover, mounting the patch on thick substrate with loaded slot technique and loading the patch with a notch technique were used to enhance the bandwidth of those designs. Hence, large fractional bandwidth is obtained.
DESIGN OF A COMPACT CIRCULAR MICROSTRIP PATCH ANTENNA FOR WLAN APPLICATIONS pijans
This paper presents the design of a compact circular microstrip patch antenna for WLAN applications which covers the band 5.15 to 5.825 GHz. The antenna is designed using 1.4mm thick FR-4 (lossy)substrate with relative permittivity 4.4 and a microstrip line feed is used. The radius of the circular patch is chosen as 7.62mm. To reduce the size and enhance the performance of the proposed antenna, a circular slot is loaded on circular patch and a square slot is etched on the ground plane of dimension 30mm×30mm. Design of the antenna is carried out using CST Microsoft Studio Sonimulation Software. The proposed antenna resonates at 5.5 GHz with a wider bandwidth of 702 MHz and it provides low return loss of -31.58 dB, good gain of 3.23 dB and directivity of 4.28 dBi and high efficiency of around 79% against the resonance frequency. The geometry of the proposed circular antenna with reduced size and its various performance parameters such as return loss, bandwidth, VSWR, gain, directivity, efficiency and radiation pattern plots are presented and discussed.
Design and Analysis of Triple-Band Multi Slotted Microstrip Patch AntennaIOSR Journals
In this paper, a multi slotted microstrip patch antenna design has been proposed. The characteristics
of the antenna are obtained in terms of return loss, gain and bandwidth. It is observed that the new proposed
configuration can operate in three different frequency bands with a good amount of bandwidth i.e. bandwidth of
21.12% at 1.1GHz frequency band, bandwidth of 11.65% at 2.11 GHz and bandwidth of 13.05% at 2.76GHz
frequency band . The resonating behavior in different frequency bands makes this antenna structure suitable for
different types of applications with an antenna gain of 6.163dBi and antenna efficiency of 86.82%.The substrate
material with relative permittivity of 4.2 and loss tangent of 0.0013 is used in this proposed antenna. The
designing and simulation of the antenna structure is done over IE3D simulation software version 15.02.
A compact triband microstrip antenna utilizing hexagonal CSRR for wireless co...journalBEEI
In this paper, a compact triband printed antenna with hexagonal complementary split-ring resonators (CSRRs) for 4G applications is proposed. The proposed multiband antenna is comprised of a rectangular patch antenna on the top plane, while on the ground plane, hexagonal CSRRs are etched for size miniaturization (at the lower bands) and multiband generation. Another effect of the CSRR is the shifting of the initial resonance of the patch antenna from 5.17 GHz to the higher band of 6.18 GHz. The triband of 180 MHz 2.4~2.59, 150 MHz 2.79~2.94 and 420 MHz 6.04~6.46 GHz bands acquired can cover WLAN/Wi-Fi and WiMAX operating bands adequately. This can be achieved by choosing the optimal size and position of the CSRR on the ground plane carefully. The design occupies a total size of 45 x 45 mm2 using the low-cost FR-4 substrate. Good agreements are obtained between the measured results and the simulated, which are discussed and presented.
E shape microstrip patch antenna design for wimax applications, international...Sk Sohag
This paper presents the design & simulation of E-shape microstrip patch antenna exhibiting wideband operating frequencies for various wireless applications. This antenna will provide the wide bandwidth which is required in various applications like remote sensing, biomedical application, mobile radio satellite, wireless communication etc. The coaxial feed or probe feed technique is used in the experiment. The performance of the designed antenna was analyzed in terms of bandwidth, gain, return loss, VSWR, and radiation pattern. The design is optimized to meet the best possible result. The proposed antenna is designed by air substrate which has a dielectric constant of 1.0006. The results show the wideband antenna is able to operate from 8.80 to 13.49 GHz frequency band with optimum frequency at 8.73 GHz.
In this paper, three novel designs of broadband patch antenna are proposed. The first design propose
broadband slotted equilateral triangular patch antenna (ETPA) operating on frequency around 1800 MHz.
The second design propose broadband slotted right angle isosceles triangular patch antenna RAITPA operating on frequency around 2400 MHz. The third design proposes wideband V-Slotted and shorted edge ETPA antenna operating on frequency around 2400 MHz. The two powerful software HFSS and IE3D are used to simulate the proposed designs. Very good agreement between HFSS and IE3D software is obtained. The designs were chosen to fit modern wireless communication applications operate at Industrial Scientific Medical (ISM) bands such as Wireless local area networks (WLAN). Moreover, mounting the patch on thick substrate with loaded slot technique and loading the patch with a notch technique were used to enhance the bandwidth of those designs. Hence, large fractional bandwidth is obtained.
Parametric Analysis of Single Element U Slot Microstrip AntennaIJSRD
In wireless communication system antennas are the most important element for creating communication link between source and destination. Microsrtip antennas are used for mobile and other satellite communication application because of their light weight, low power handling capacity and low profile. The modern mobile communication system requires high gain, wide bandwidth and minimal size antennas that are capable of providing better performance over a wide range of frequency spectrum. This requirement leads to the design of microsrtip patch array antenna. This paper proposes the parametric analysis of single element U slot MSA. Low dielectric constant substrates are generally preferred for maximum radiation. Thus it prefers FR4 as a dielectric substrate. Desired patch antenna design is simulated by using high frequency simulation software and patch antenna is designed as per requirement. Antenna dimensions such as Length (L), Width (W), and substrate dielectric constant and parameters like Return Loss, Gain, impedance and current distribution are calculated using CAD-FEKO. The antenna has been design to be operated in the range of 8-12GHz. Hence this antenna is highly suitable for X-band applications.
Design & Simulation of E-Shaped Micro Strip Patch Antenna for GPS ApplicationIJERA Editor
Micro strip antennas are widely used in many applications due to their low Profile, low cost and ease of fabrication. In some applications it is desired to have a dual band or multiband characteristics. This paper presents the design and simulation of E-shape micro strip patch antenna with wideband operating frequency for wireless application. The shape will provide the broad bandwidth which is required in various application like remote sensing, biomedical application, mobile radio, satellite communication etc. The antenna design is an improvement from previous research and it is simulated using HFSS (High Frequency Structure Simulator) version 13.0 software. GPS provides specially coded satellite signals that can be processed with a GPS receiver enabling the receiver to compute position, velocity and time. Coaxial feed or probe feed technique is used. Parametric study was included to determine affect of design towards the antenna performance. Radiation performance of the designed antenna is simulated using the HFSS software version 13.0. The performance of the designed antenna was analyzed in term of bandwidth, gain, return loss, VSWR, and radiation pattern. The design was optimized to meet the best possible result. Substrate used was air which has a dielectric constant of 1.0006. The results show the wideband antenna is able to operate from 8.80 GHz to 13.49 GHz frequency band with optimum frequency at 8.73 GHz. Due to the compact area occupied. The pro-posed antenna is promising to be embedded within the different portable devices employing GPS applications.
A small H-shaped microstrip patch antenna (MPA) with enhanced bandwidth is presented. The H-shaped antenna is first studied and then fully simulated by HFSS. A dual U slot H patch configuration is proposed to increase the narrow bandwidth, radiation efficiency and directivity. A novel H-shaped patch antenna suitable for wireless and satellite communications is presented. This paper presents the dual U slot H-shaped microstrip patch antenna feed by transmission line. The decrease in the prices of handheld devices and services has made available on the move internet and web services facility to the customers, small antennas requirement are increasing. In this paper H-shaped patch antenna is designed using FR4 substrate. The proposed modified H shaped antenna is designed and simulated using HFSS and caters to various wireless applications such as WiMAX, Wi-Fi, UMTS and Digital Multimedia Broadcasting (DMB) e.g. T V, etc.
TRI-BAND MICROSTRIP PATCH ANTENNA FOR S-BAND NANO SATELLITE APPLICATION USING...ijsrd.com
It's the generation of tiny satellites which basically needs all its components to be miniature. The product proposed here is one such component, a tri band micro strip patch antenna operating at 2.6GHz, 3.6GHz S-band frequencies and 5.8 GHz. This real-time project work deals with a rectangular patch antenna operating at different frequencies working for various applications. The proposed S-Band Patch antenna is being designed and simulated using HFSS software. Obtaining optimum bandwidth efficiency by choosing suitable size without affecting any other parameters of the antenna is the challenge taken over in this project. The low profile, less weight patch antenna has antenna element of physical dimension 40x40x2.6mm .The substrate material being used is Alumina with dielectric constant 9.6. This antenna is designed to be used for TTC and payload downlink purposes. The designed patch array antenna meets all the parametric needs for a Polar orbiting satellite at Low Earth Orbit (LEO) region.
Design of Circular Patch with Double C-Shaped Slot Microstrip Antenna for LTE...TELKOMNIKA JOURNAL
The design of a circular patch microstrip antenna with double C-shaped for LTE 1800 MHz is
presented. The antenna is designed using FR-4 with dielectric constant of ε = 4.3, with thickness of
substrate that is 1.6 mm and the thickness of patch and ground are 0.025 mm, Respectively the simulation
results presented that the antenna works at frequency of 1714-1889.6 MHz, and work very well at
frequency of 1800 MHz with a Return loss -20.484 dB, bandwidth 175.6 MHz. Technique used for broaden
the bandwidth by using double C-shaped slot. In this paper presents S-Parameters, and Gain of microstrip
antenna circular patch with double C-shaped slot.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
A Low Profile CombinedArray Antenna for Wireless Applicationdbpublications
In wireless communication, micro strip antenna is used for various applications such as Wireless local area network, Bluetooth, Cordless Telephones and ISM band. Here a low profile microstrip antenna is to be designed. The antenna is constructed with FR4 substrate having relative permittivity of 4.4 and thickness of 1.6 mm. The unique (symmetric) array design enhances the narrow bandwidth and gain. The design results in extended WLANin X-band applications. Using High Frequency Structure Simulator (HFSS) software package, the antenna is simulated and dimensions are adjusted to achieve the desired resonant frequencies for desired operation.
In this paper a compact, flexible, Multiband antenna is designed. It is having flexible Substrate of photographic paper which makes the antenna conformal. The antenna with two U slots cut in radiating patch is offset fed by microstrip lines gives the multiple bands of WLAN/WIMAX Application and two parasitic Elements improves the bandwidth of a typical microstrip antenna. The Measured results shows that the antenna resonates between Frequency band 2.10-2.95 GHz, 3.35-3.54 GHz and 5.04-6.0Hz.which are used for application such as Bluetooth, Wi-Fi, Zigbee, ISM 2.4GHz,WLAN WiMAX, and WLAN 5.2GHz.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
Design LTE Microstrip Antenna Rectangular Patch with Beetle-Shaped SlotTELKOMNIKA JOURNAL
In this paper, the microstrip antenna rectangular patch with beetle shaped slot is presented. The
characterization results of the proposed antenna obtained by changing the dimensions of the ground
plane. CST software is used to design and analyze this proposed antenna. The simulated results of
proposed antenna show that the antenna works at the frequency of 2.1 GHz while the return loss of -32.18
dB with the bandwidth reaches 155.19 MHz and the gain of 3.895 dBi.
A CPW-fed Rectangular Patch Antenna for WLAN/WiMAX ApplicationsIDES Editor
This paper presents a CPW fed Rectangular
shaped patch antenna for the frequency 3.42GHz which
falls in WiMAX and 5.25GHz for WLAN applications.
The measured -10dB impedance bandwidth is about
650MHz (2.98GHz-3.63GHz) for WiMAX and 833MHz
(4.95GHz-5.78GHz) for WLAN applications. The effect of
slot width, rectangular patch height, and substrate
dielectric constant have been evaluated. The results of
antenna are simulated by using Zeeland’s MOM based
IE3D tool. Two dimensional radiation patterns with
elevation and azimuth angles, VSWR<2, Return loss of
-24dB and -18dB for WiMAX and WLAN applications,
antenna efficiency about 90%, gain above 3.5dB are
obtained. The compact aperture area of the antenna is
46.2 X 41.66 mm2.
Design and Improved Performance of Rectangular Micro strip Patch Antenna for ...IJERA Editor
In the resent year the development in communication system requires the development of low cast, minimum weight and low profile antennas that are capable of maintaining high performance over wide spectrum of frequency. This technological trend has focused much effort into the design of micro strip patch antenna. The object of this paper is to design an micro strip line fed rectangular micro strip patch antenna which operate in C-band at 5.33 GHz the antenna design is based on high frequency structure simulation (HFSS) software which is infinite element method based. This proposed antenna is design at height of 1.5 mm from the ground plane at frequency of 5.33GHz. The HFSS software has become the most versatile, easy to used, efficient and accurate simulation tool. After the simulation the performance characteristics such as input impedance, return loss, and VSWR are obtained
A Miniature BroadBand Microstrip Antenna for LTE, Wi-Fi and WiMAX Applications IJECEIAES
A Compact microstrip antenna with rectangular slotted radiating element has been developed. Four slots have been introduced on the radiating element with the use of a partial ground plane and a wideband response has been obtained. The bandwidth of the proposed antenna is 1.7 GHz with a percentage bandwidth of 71%. A low-cost dielectric (FR4_EPOXY) has been considered in the development of the proposed antenna. The obtained frequency band is from 1.9 GHz to 3.6 GHz. To investigate the robustness of our modelled antenna the simulation process has been carried out using two different solvers (Finite Element Method and Finite Integration Technique). In addition, the designed antenna was realized and these results were compared with those of the simulation. The proposed antenna is suitable for many LTE bands {1, 3, 7… 38, 40} broadly deployed in European, South American, Asian, and African countries, Wi-Fi (2.4 GHz), and WiMAX technology (3.5 GHz).
Mobile computing application risks in ZimbabweIOSR Journals
Abstract: Mobile technology has now become the order of the day. Everyone seems to own one or more mobile
devices. Everyone is so excited because this has made life easier for a lot of people. Though mobile technology
has brought many benefits to people’s lives, its application has some risks that come with it. This paper
therefore looked at mobile computing application areas in Zimbabwe, the risks brought about by mobile
computing application in Zimbabwe and how mobile computing application risks are mitigated in a developing
country like Zimbabwe where the technology level seems to be behind. The study findings showed that mobile
application areas in Zimbabwe include paying bills, social networking and playing games. Most Zimbabweans
revealed that they do not know how to mitigate mobile computing application risks. The study finally
recommended that mobile computing application risks should be taught in schools as well as in televisions and
radios so that everyone is aware of them.
Keywords: application risks, mobile computing, mobile device,mobile technology
Factor analysis as a tool for evaluation of spatial and temporal variations i...IOSR Journals
In this case study, factor analysis was applied for evaluation of temporal/spatial variations in the
groundwater quality of Aravakurichi block, Karur district, Tamil Nadu, India. This statistical technique was
employed for the better interpretation of large complex water quality data set obtained from twenty five
groundwater locations in four seasons during the year 2012. The water samples were characterized for the
physico-chemical parameters such as pH, total alkalinity, electrical conductivity, total hardness, calcium ions,
magnesium ions, total dissolved solids, fluorides, chlorides and sulphates. Factor analysis indicated four factors
initially and when rotation of the factor axis was executed, it yielded two factors with clear indication of high
loadings for some variable and low loadings for others, facilitating data interpretation in terms of original
variables. Overall, this case study demonstrated the effectiveness of factor analysis to identify marker variables
for assessing the chemistry of groundwater besides earmarking representative sampling stations to undertake
suitable water quality management in a shortest possible time.
Parametric Analysis of Single Element U Slot Microstrip AntennaIJSRD
In wireless communication system antennas are the most important element for creating communication link between source and destination. Microsrtip antennas are used for mobile and other satellite communication application because of their light weight, low power handling capacity and low profile. The modern mobile communication system requires high gain, wide bandwidth and minimal size antennas that are capable of providing better performance over a wide range of frequency spectrum. This requirement leads to the design of microsrtip patch array antenna. This paper proposes the parametric analysis of single element U slot MSA. Low dielectric constant substrates are generally preferred for maximum radiation. Thus it prefers FR4 as a dielectric substrate. Desired patch antenna design is simulated by using high frequency simulation software and patch antenna is designed as per requirement. Antenna dimensions such as Length (L), Width (W), and substrate dielectric constant and parameters like Return Loss, Gain, impedance and current distribution are calculated using CAD-FEKO. The antenna has been design to be operated in the range of 8-12GHz. Hence this antenna is highly suitable for X-band applications.
Design & Simulation of E-Shaped Micro Strip Patch Antenna for GPS ApplicationIJERA Editor
Micro strip antennas are widely used in many applications due to their low Profile, low cost and ease of fabrication. In some applications it is desired to have a dual band or multiband characteristics. This paper presents the design and simulation of E-shape micro strip patch antenna with wideband operating frequency for wireless application. The shape will provide the broad bandwidth which is required in various application like remote sensing, biomedical application, mobile radio, satellite communication etc. The antenna design is an improvement from previous research and it is simulated using HFSS (High Frequency Structure Simulator) version 13.0 software. GPS provides specially coded satellite signals that can be processed with a GPS receiver enabling the receiver to compute position, velocity and time. Coaxial feed or probe feed technique is used. Parametric study was included to determine affect of design towards the antenna performance. Radiation performance of the designed antenna is simulated using the HFSS software version 13.0. The performance of the designed antenna was analyzed in term of bandwidth, gain, return loss, VSWR, and radiation pattern. The design was optimized to meet the best possible result. Substrate used was air which has a dielectric constant of 1.0006. The results show the wideband antenna is able to operate from 8.80 GHz to 13.49 GHz frequency band with optimum frequency at 8.73 GHz. Due to the compact area occupied. The pro-posed antenna is promising to be embedded within the different portable devices employing GPS applications.
A small H-shaped microstrip patch antenna (MPA) with enhanced bandwidth is presented. The H-shaped antenna is first studied and then fully simulated by HFSS. A dual U slot H patch configuration is proposed to increase the narrow bandwidth, radiation efficiency and directivity. A novel H-shaped patch antenna suitable for wireless and satellite communications is presented. This paper presents the dual U slot H-shaped microstrip patch antenna feed by transmission line. The decrease in the prices of handheld devices and services has made available on the move internet and web services facility to the customers, small antennas requirement are increasing. In this paper H-shaped patch antenna is designed using FR4 substrate. The proposed modified H shaped antenna is designed and simulated using HFSS and caters to various wireless applications such as WiMAX, Wi-Fi, UMTS and Digital Multimedia Broadcasting (DMB) e.g. T V, etc.
TRI-BAND MICROSTRIP PATCH ANTENNA FOR S-BAND NANO SATELLITE APPLICATION USING...ijsrd.com
It's the generation of tiny satellites which basically needs all its components to be miniature. The product proposed here is one such component, a tri band micro strip patch antenna operating at 2.6GHz, 3.6GHz S-band frequencies and 5.8 GHz. This real-time project work deals with a rectangular patch antenna operating at different frequencies working for various applications. The proposed S-Band Patch antenna is being designed and simulated using HFSS software. Obtaining optimum bandwidth efficiency by choosing suitable size without affecting any other parameters of the antenna is the challenge taken over in this project. The low profile, less weight patch antenna has antenna element of physical dimension 40x40x2.6mm .The substrate material being used is Alumina with dielectric constant 9.6. This antenna is designed to be used for TTC and payload downlink purposes. The designed patch array antenna meets all the parametric needs for a Polar orbiting satellite at Low Earth Orbit (LEO) region.
Design of Circular Patch with Double C-Shaped Slot Microstrip Antenna for LTE...TELKOMNIKA JOURNAL
The design of a circular patch microstrip antenna with double C-shaped for LTE 1800 MHz is
presented. The antenna is designed using FR-4 with dielectric constant of ε = 4.3, with thickness of
substrate that is 1.6 mm and the thickness of patch and ground are 0.025 mm, Respectively the simulation
results presented that the antenna works at frequency of 1714-1889.6 MHz, and work very well at
frequency of 1800 MHz with a Return loss -20.484 dB, bandwidth 175.6 MHz. Technique used for broaden
the bandwidth by using double C-shaped slot. In this paper presents S-Parameters, and Gain of microstrip
antenna circular patch with double C-shaped slot.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
A Low Profile CombinedArray Antenna for Wireless Applicationdbpublications
In wireless communication, micro strip antenna is used for various applications such as Wireless local area network, Bluetooth, Cordless Telephones and ISM band. Here a low profile microstrip antenna is to be designed. The antenna is constructed with FR4 substrate having relative permittivity of 4.4 and thickness of 1.6 mm. The unique (symmetric) array design enhances the narrow bandwidth and gain. The design results in extended WLANin X-band applications. Using High Frequency Structure Simulator (HFSS) software package, the antenna is simulated and dimensions are adjusted to achieve the desired resonant frequencies for desired operation.
In this paper a compact, flexible, Multiband antenna is designed. It is having flexible Substrate of photographic paper which makes the antenna conformal. The antenna with two U slots cut in radiating patch is offset fed by microstrip lines gives the multiple bands of WLAN/WIMAX Application and two parasitic Elements improves the bandwidth of a typical microstrip antenna. The Measured results shows that the antenna resonates between Frequency band 2.10-2.95 GHz, 3.35-3.54 GHz and 5.04-6.0Hz.which are used for application such as Bluetooth, Wi-Fi, Zigbee, ISM 2.4GHz,WLAN WiMAX, and WLAN 5.2GHz.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
Design LTE Microstrip Antenna Rectangular Patch with Beetle-Shaped SlotTELKOMNIKA JOURNAL
In this paper, the microstrip antenna rectangular patch with beetle shaped slot is presented. The
characterization results of the proposed antenna obtained by changing the dimensions of the ground
plane. CST software is used to design and analyze this proposed antenna. The simulated results of
proposed antenna show that the antenna works at the frequency of 2.1 GHz while the return loss of -32.18
dB with the bandwidth reaches 155.19 MHz and the gain of 3.895 dBi.
A CPW-fed Rectangular Patch Antenna for WLAN/WiMAX ApplicationsIDES Editor
This paper presents a CPW fed Rectangular
shaped patch antenna for the frequency 3.42GHz which
falls in WiMAX and 5.25GHz for WLAN applications.
The measured -10dB impedance bandwidth is about
650MHz (2.98GHz-3.63GHz) for WiMAX and 833MHz
(4.95GHz-5.78GHz) for WLAN applications. The effect of
slot width, rectangular patch height, and substrate
dielectric constant have been evaluated. The results of
antenna are simulated by using Zeeland’s MOM based
IE3D tool. Two dimensional radiation patterns with
elevation and azimuth angles, VSWR<2, Return loss of
-24dB and -18dB for WiMAX and WLAN applications,
antenna efficiency about 90%, gain above 3.5dB are
obtained. The compact aperture area of the antenna is
46.2 X 41.66 mm2.
Design and Improved Performance of Rectangular Micro strip Patch Antenna for ...IJERA Editor
In the resent year the development in communication system requires the development of low cast, minimum weight and low profile antennas that are capable of maintaining high performance over wide spectrum of frequency. This technological trend has focused much effort into the design of micro strip patch antenna. The object of this paper is to design an micro strip line fed rectangular micro strip patch antenna which operate in C-band at 5.33 GHz the antenna design is based on high frequency structure simulation (HFSS) software which is infinite element method based. This proposed antenna is design at height of 1.5 mm from the ground plane at frequency of 5.33GHz. The HFSS software has become the most versatile, easy to used, efficient and accurate simulation tool. After the simulation the performance characteristics such as input impedance, return loss, and VSWR are obtained
A Miniature BroadBand Microstrip Antenna for LTE, Wi-Fi and WiMAX Applications IJECEIAES
A Compact microstrip antenna with rectangular slotted radiating element has been developed. Four slots have been introduced on the radiating element with the use of a partial ground plane and a wideband response has been obtained. The bandwidth of the proposed antenna is 1.7 GHz with a percentage bandwidth of 71%. A low-cost dielectric (FR4_EPOXY) has been considered in the development of the proposed antenna. The obtained frequency band is from 1.9 GHz to 3.6 GHz. To investigate the robustness of our modelled antenna the simulation process has been carried out using two different solvers (Finite Element Method and Finite Integration Technique). In addition, the designed antenna was realized and these results were compared with those of the simulation. The proposed antenna is suitable for many LTE bands {1, 3, 7… 38, 40} broadly deployed in European, South American, Asian, and African countries, Wi-Fi (2.4 GHz), and WiMAX technology (3.5 GHz).
Mobile computing application risks in ZimbabweIOSR Journals
Abstract: Mobile technology has now become the order of the day. Everyone seems to own one or more mobile
devices. Everyone is so excited because this has made life easier for a lot of people. Though mobile technology
has brought many benefits to people’s lives, its application has some risks that come with it. This paper
therefore looked at mobile computing application areas in Zimbabwe, the risks brought about by mobile
computing application in Zimbabwe and how mobile computing application risks are mitigated in a developing
country like Zimbabwe where the technology level seems to be behind. The study findings showed that mobile
application areas in Zimbabwe include paying bills, social networking and playing games. Most Zimbabweans
revealed that they do not know how to mitigate mobile computing application risks. The study finally
recommended that mobile computing application risks should be taught in schools as well as in televisions and
radios so that everyone is aware of them.
Keywords: application risks, mobile computing, mobile device,mobile technology
Factor analysis as a tool for evaluation of spatial and temporal variations i...IOSR Journals
In this case study, factor analysis was applied for evaluation of temporal/spatial variations in the
groundwater quality of Aravakurichi block, Karur district, Tamil Nadu, India. This statistical technique was
employed for the better interpretation of large complex water quality data set obtained from twenty five
groundwater locations in four seasons during the year 2012. The water samples were characterized for the
physico-chemical parameters such as pH, total alkalinity, electrical conductivity, total hardness, calcium ions,
magnesium ions, total dissolved solids, fluorides, chlorides and sulphates. Factor analysis indicated four factors
initially and when rotation of the factor axis was executed, it yielded two factors with clear indication of high
loadings for some variable and low loadings for others, facilitating data interpretation in terms of original
variables. Overall, this case study demonstrated the effectiveness of factor analysis to identify marker variables
for assessing the chemistry of groundwater besides earmarking representative sampling stations to undertake
suitable water quality management in a shortest possible time.
Fault Detection Technique for Compact AES DesignIOSR Journals
Abstract: Cryptography is a method that has been developed to ensure the secrecy of messages and transfer data securely. Advanced Encryption Standard (AES) has been made as the first choice for many critical applications because of the high level of security and the fast hardware and software implementations, many of which are power and resource constrained and requires reliable and efficient hardware implementations. Naturally occurring and maliciously injected faults reduce the reliability of Advanced Encryption Standard (AES) and may leak confidential information. In this paper, a lightweight concurrent fault detection scheme for the AES is presented. In the proposed approach, the composite field S-box and inverse S-box are divided into blocks and the predicted parities of these blocks are obtained. For high speed applications, S-box implementation based on lookup tables is avoided. Instead, logic gate implementations based on composite fields are utilized. A compact architecture for the AES Mix-columns operation and its inverse is also presented. This parity-based fault detection scheme reaches the maximum fault coverage when compared to other methods of fault detection. The proposed fault detection technique for AES encryption and decryption has the least area and power consumption compared to their counterparts with similar fault detection capabilities. Index terms: AES, composite fields, parity prediction, fault detection, S-box.
A Study on the Relationship between Nutrition Status and Physical Fitness of ...IOSR Journals
Abstract: Nutritional status during school age is a major determinant of nutritional and health status in adult
life. Many studies showed that under nutrition and anaemia had an adverse impact on performance and
consequently led to reduction in wages for persons employed in manual labour.
The past three decades have witnessed the emergence of over nutrition as a problem in school-age children in
developed countries and in affluent urban segments in developing countries. The main determinants of
performance are physical fitness and skill. Longitudinal studies have shown that the lifestyle and physical
fitness during childhood and adolescence were major determinants of lifestyle, physical fitness and freedom
from non-communicable diseases in adult life.
Study On Traffic Conlict At Unsignalized Intersection In Malaysia IOSR Journals
The research conducted is traffic conflict at unsignalized intersections . The purpose of this research
is to study accident data used as an identification of hazardous location leads to less accurate countermeasures.
It is because accidents are not always reported especially accident involving damage only and this situation can
reduce good comparative analysis. To overcome these lacks of accident data, many ways of employing nonaccident
data have been suggested. One of the ways using non-accident data is traffic conflicts, which is defined
as critical incidents not necessarily involving collisions. The traffic conflict technique was originally set up to
provide more reliable data and information of traffic problems at intersections which actually would replace the
unclear and incomplete recorded data accident. The conflict study was done at the selected unsignalized
intersection where types of traffic conflict can be identified and classified. Various road users involved in the
conflict at the unsignalized intersection were also observed. Then conflicts data captured were analyzed using
the computer program to observe for any conflicts at the intersections. The linear regression graph was used to
show the relationship between conflict and accident data where two different equations were derived from the
graph. This equation may be used to make a prediction for the relationship that might exist between those two
variables at another location.
Parametric Optimization of Single Cylinder Diesel Engine for Pyrolysis Oil an...IOSR Journals
Abstract: An experimental study has been carried out for pyrolysis oil blended with diesel used in single
cylinder diesel engine. Pyrolysis oil is obtained from tire waste by pyrolysis process. Pyrolysis process is a
thermo-chemical decomposition of organic matter in absence of oxygen. Blending of pyrolysis oil with diesel in
maximum possible proportion helps to reduce the consumption of diesel fuel. In this study, the effects of
parameters i.e. injection timing, injection pressure, compression ratio, and load are taken as variable for
optimization. As the experiment required simultaneously optimization of four parameters with five levels,
taguchi method of optimization is used in this experiment. The results of the taguchi experiment identifies that
220 injection timing, injection pressure 200 bar, compression ratio 16 and engine load 20kg are optimum
parameter setting for lowest break specific fuel consumption. Engine performance is mostly influenced by
engine load and is least influenced by Compression ratio.
Keyword: Pyrolysis oil, SFC, Taguchi Analysis, CI engine, Diesel
Capacity Spectrum Method for RC Building with Cracked and Uncracked SectionIOSR Journals
one of the most widespread procedures for the assessment of building behavior, due to earthquake, is the Capacity Spectrum Method (CSM). In the scope of this procedure, capacity of the structure compares with the demands of earthquake ground motion on the structure. The capacity of the structure is represented by a nonlinear force-displacement curve, referred to as a pushover curve. The base shear forces and roof displacements are converted to equivalent spectral accelerations and spectral displacements, respectively, by means of coefficients that represent effective modal masses and modal participation factors. These spectral values define the capacity spectrum. The demands of the earthquake ground motion are represented by response spectra. A graphical construction that includes both capacity and demand spectra, results in an intersection of the two curves that estimates the performance of the structure to the earthquake. In this study, for determination of the performance levels, G+10 R.C.C. Building with cracked and uncracked section were taken. The structural Capacity of cracked and uncracked section compared with performance point value, which shows the structural capacity of building having cracked section is lesser than the uncracked section. Different modeling issues were analyzed to study the effect on Capacity of the structure with cracked and uncracked section for different position of Shear wall.
Design & Simulation of 8-Shape Slotted Microstrip Patch Antenna
This paper presents an 8-shape slotted microstrip patch antenna. The antenna is fed by microstrip
transmission line. The proposed antenna is simulated with the help of commercially available GEMS software
based on the parallel FDTD algorithm. The antenna is designed by FR4 substrate and ground plane with an area
50mm×40mm×1.60 mm. The designed antenna generates three resonant modes at 2.12 GHz, 6.98 GHz and 13.84
GHz respectively. The bandwidths of the antenna (-10 dB) of the three frequencies are 25.75%, 6.13% and
20.63% respectively. The return loss (S ) characteristics for the three bands are -41.95 dB, -22.68 dB and -23.15
11
dB respectively. The 3D radiation patterns of the proposed antenna are provided in the paper.
Design of a Rectangular Microstrip Patch Antenna Using Inset Feed TechniqueIOSR Journals
Abstract : Today in the world of communication systems the most widely researched area is of wireless technology and a study of communication systems is incomplete without an understanding of the operation of the antennas. In the recent years of development in communication systems a need for the development of lightweight, compact and cost-effective antennas that are capable of maintaining high performance over a wide spectrum of frequencies. This technological trend has focused much effort into the design of a Micro strip patch antenna. In this work, the simulation tool of IE3D is used to study the performance and gain of the rectangular Microstrip patch antenna. The design and simulation of patch antennas is widely used in mobile cellular phones today, and our emphasis in this work is on optimization of a 2.4 GHz rectangular Microstrip patch antenna. The return loss and the various gain plots have been studied along with the radiation patterns. Keywords: Gain, Inset feed, Patch antenna, Radiation pattern, Return Loss.
MINIATURISATION OF PATCH ANTENNA USING NOVEL FRACTAL GEOMETRYIAEME Publication
In the Field of low profile antennamicro strip patch antennas have attracted many researchers due to small sizeand low cost of fabrication. One of trending member of new designs is Fractalantenna. Fractal shapes are recursive/repetitive self-similar geometries, dueto this self-similarity they can provide high gain, multiband, widebandsolutions and design miniature antenna. Fractal shapes are widely used incomputing, analysis and design; recent trends suggest positive outcomes ofusing fractal shapes in electromagnetics and communication system. In thispaper Jerusalem cube fractal shape is introduced in probe fed conventionalpatch antenna for L1 band. A dual band antenna resonating at 1.41 GHz (L) and3.37 (S) GHz, band is constructed using said fractal shape.
Multiband antenna using stacked series array for Ka-Band applicationjournalBEEI
In this paper, a multiband stack series array antenna is designed in order to attain solutions for the future 28 GHz Ka-band application. Double layer substrate Technology is utilized to accomplish multiple resonant frequencies with higher data transfer capacities due to high bandwidth. The designed antenna is dependent on twofold layer consisting patches and resonators in different layers stacked together. The designed multiband antennas can resonate at single band of
(28 GHz), dual band of (28 and 30 GHz) and triple band of (24.18, 26 and 28.453). The results achieved in the simulation are later fabricated and tested. The test result illustrates that the antennas have wide bandwidth, high gain and even higher efficiencies. All the proposed antenna configurations have demonstrated a decent possibility for 5G millimeter wave (mmwave) application.
Rectangular and circular antennas design for Bluetooth applicationsTELKOMNIKA JOURNAL
The most researched and examined aspect of the communication system is the wireless connection. Without learning how to operate and use different types of antennas, your knowledge is incomplete. Microstrip patch antenna research has advanced significantly in recent years. When compared to standard antennas, microstrip patch antennas provide additional advantages and opportunities. It is of low volume, light weight, low cost, low appearance, compact and easy to manufacture. This study investigates the differences between rectangular and circular patch antennas. For Bluetooth applications, the center frequency of 2.4 GHz was chosen as the optimal resonant frequency. On a flame retardant (FR-4) epoxy substrate, the antenna dielectric constant is 4.4. Above the ground the base rises 3.6 mm. For the simulation process, high frequency simulation software (HFSS 15) is used as the program design. Antennas 1×1, 1×2, and 1×4 are designed for both circular and rectangular antennas. A comparison was made for both types of antennas and voltage standing wave ratio (VSWR), return losses, gain, directivity and half power beam width (HPBW) were found, and the feature of the rectangular antenna was shown.
Design and Analysis of MIMO Patch Antenna for 5G Wireless Communication SystemsIJCNCJournal
In this work, the circular array microstrip patch antenna (MPA) design is proposed for the 5G wireless communication and the millimeter- wave frequency being utilized for this communication system to enhance the coverage area. Here, the Multi Input Multi Output feeding technique is utilized to improve the performance of the proposed design at a resonant frequency of 35 GHz with RT-Duroid 5880 material as substrate. It has 2.2 dielectric constant value and the thickness is 0.5mm.The simulation analysis has obtained the gain as 8.8dB and return loss as -41.9dB. Also, two MPA designs such as single element MPA and 2x2 rectangular array MPA are designed to validate the proposed antenna design. A comparative analysis has proved that the circular array MPA is preferable for the 5G wireless communication system compared to the other two designs such as single element MPA and 2x2 rectangular array MPA.
DESIGN AND ANALYSIS OF MIMO PATCH ANTENNA FOR 5G WIRELESS COMMUNICATION SYSTEMSIJCNCJournal
In this work, the circular array microstrip patch antenna (MPA) design is proposed for the 5G wireless
communication and the millimeter- wave frequency being utilized for this communication system to
enhance the coverage area. Here, the Multi Input Multi Output feeding technique is utilized to improve the
performance of the proposed design at a resonant frequency of 35 GHz with RT-Duroid 5880 material as
substrate. It has 2.2 dielectric constant value and the thickness is 0.5mm.The simulation analysis has
obtained the gain as 8.8dB and return loss as -41.9dB. Also, two MPA designs such as single element MPA
and 2x2 rectangular array MPA are designed to validate the proposed antenna design. A comparative
analysis has proved that the circular array MPA is preferable for the 5G wireless communication system
compared to the other two designs such as single element MPA and 2x2 rectangular array MPA.
Microstrip Rectangular Monopole Antennas with Defected Ground for UWB Applica...IJECEIAES
This paper presents the design of new compact antennas for ultra wide band applications. Each antenna consists of a rectangular patch fed by 50Ω microstrip transmission line and the ground element is a defected ground structure (DGS). The aim of this study is to improve the bandwidth of these antennas by using DGS and the modification geometry of rectangular structure, which gives new compact antennas for UWB applications. The input impedance bandwidth of the antennas with S11<-10dB is more than 10GHz, from 3GHz to more than 14 GHz. The proposed antennas are investigated and optimized by using CST microwave studio, they are validated by using another electromagnetic solver Ansoft HFSS. The measured parameters present good agreement with simulation. The final antenna structures offer excellent performances for UWB system.
Design and Analysis of Broadband Elliptical Microstrip Patch Antenna for Wire...TELKOMNIKA JOURNAL
In this paper presents the design and manufacture of a new broadband elliptical patch antenna
with a microstrip feed line and optimum antenna parameters. The antenna dimension of
(30 × 21 × 1.6) 푚푚3 and fabricated on an FR-4 epoxy substrate having relative dielectric constant 휀푟=4.3,
loss tangent tan (δ)=0.002 and the feed line used has characteristic impedance of 50Ω.The designed
antenna has the capability of operating in the bandwidth (6.95-30.94) GHz and the gain (6.8) dBi. The
antenna performance was modified by inserting a slots in the ground plane to achieve impedance
bandwidth (when S11≤-10dB) and slots to patch to improve the gain. The modified antenna was designed
to be used for fifth generation (5G) mobile communication. The simulation results are obtained using CST
software.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
AKS UNIVERSITY Satna Final Year Project By OM Hardaha.pdf
Design and Analysis of Microstrip Antenna for CDMA Systems Communication
1. IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
e-ISSN: 2278-2834,p- ISSN: 2278-8735.Volume 6, Issue 2 (May. - Jun. 2013), PP 81-85
www.iosrjournals.org
www.iosrjournals.org 81 | Page
Design and Analysis of Microstrip Antenna for CDMA Systems
Communication
Eng: Hassan Elesawy1
, Dr: W. Swelam2
, Dr: Abdal.Fouda3
, Prof. Dr. I. Hafez4
1(Electronics and Communication, Faculty of Engineering, Ain Shams University, Cairo, Egypt)
2(Electronics and Communication, Faculty of Engineering, Ain Shams University, Cairo-Egypt)
3 (Communication, Faculty of Engineering, Modern Academy;
4 (Chairman of Electronics and Communication, Faculty of Engineering, Ain Shams University , Cairo-Egypt)
Abstract: This paper proposes a newly designed microstrip patch antennas (MSA) for wireless application
(CDMA Systems). The designed single antenna E-shaped patch antenna. Two parallel slots are in corporated
into the patch of a microstrip antenna to expand it bandwidth, and designed antenna operates in the frequency
range of 1.85 to 1.99 GHz. The antenna is designed using air as a dielectric substrate between the ground plane
and substrate patch antenna. IE3D is a full-wave electromagnetic simulator based on the method of moments
(MoM) technique. It has been widely used in the design of MICs, RFICs, patch antennas, wire antennas, and
other RF/wireless antennas. It can be used to calculate and plot the S parameters, VSWR, current distributions
as well as the radiation patterns. The results obtained for each patch were 2D and 3D view of patch, Directivity,
Gain, beam width and other such parameters, true and mapped 3D radiation pattern, and 2D polar radiation
pattern. The antenna successfully achieves the exhibit a broad impedance bandwidth of 27 % (at VSWR < 2)
with respect to the center frequency of 1.9 GHz is designed, fabricated, and finally measured on Spectrum
analyzer. The radiation pattern and directivity are also presented.. Gain maximum achievable is 3 dBi and good
return loss (S11 parameters) of -30 dB is achieved along with broadside radiation pattern.
Keywords - Microstrip Patch Antenna; E-shaped, CDMA systems communications; Coaxial Probe feed, IE3D.
I. Introduction
Due to the rapid progress in various wireless communication systems, more researches are required to
develop antennas with reduced size and enhanced frequency bandwidth to meet the miniaturization requirements
of mobile systems such as mobile cellular, mobile cordless. Each wireless communication standard will require
an antenna that resonates at its frequency of operation. With multiple standards and services, one could easily
imagine a multitude of antennas required both at the base station site, and also on the mobile device. One of
types of wireless communication at 1.9 GHz is Wireless fidelity CDMA systems, personal communication
system (PCS) and other next-generation wireless systems. One of the key components interfacing between the
CDMA system hardware and the „Ether‟, i.e. the air-interface for wireless communication is the antenna. With
tremendous growth and demand for high speed high data rate wireless communication, more and more antennas,
and antennas covering a multitude of frequency bands are required.
Antennas play a very important role in the field of wireless communications. Some of them are
parabolic reflectors, patch antennas, slot antennas and folded dipole antennas. Each type of antenna is good in its
own properties and usage. We can say antennas are the backbone and almost everything in the wireless
communication without which the word could have not reached at this age of technology. It is well known that
MSA are attractive and popular due to their natural advantages such as small size, low weight and low cost of
production. Possible techniques for increasing its frequency bandwidth have received much attention. In addition
to the common techniques of increasing patch height and decreasing substrate permittivity, a popular method
which is the use of parasitic patches [1]. Patch antennas play a very significant role in today's world of wireless
communication systems. Another way to increase the bandwidth of an MSA is to decrease the dielectric constant
of the substrate [2]. This paper presents an E-shaped antenna for mobile base station using microstrip antenna
(MSA) covered. The advantages of this proposed antenna are light weight, easy fabrication and installation, and
moderately high gain compare to the other antennas in the cellular phone system at present. Moreover, it
provides a Broadside-shaped radiation pattern and wider in the horizontal direction.
In this paper, we present a novel single-patch wide-band microstrip antenna: the E-shaped patch
antenna. When two parallel slots are incorporated into the antenna patch, the E-shaped patch antenna is simpler
in construction. By only adjusting the length, width, and position of the slots, one can obtain satisfactory
performances. Some experimental results prove the validity of this design. The method of moments with the
vector triangular basis function [3] is used for analysis, as well as IE3D software. The electric currents on the E-
shaped patch are calculated and graphically presented to explain the wide-band mechanism. Subsequently, a
wide-band E-shaped patch antenna with 27 % bandwidth is designed to cover 1.85-1.99 GHz frequency. This
2. Design and Analysis of Microstrip Antenna for CDMA systems Communication
www.iosrjournals.org 82 | Page
range of frequency is very desirable in modern wireless communications. Radiation patterns are also measured
and compared with the numerical data. However, this has detrimental effects on antenna size reduction since the
resonant length of an MSA is shorter for higher substrate dielectric constant. In addition, the directivity of the
MSA depends on the dielectric constant of the substrate. The next section describes the antenna design and the
idea of operation. Section 3 covers the simulation process and results analysis. Section 4 shows the conclusion.
Show the Reference is final section.
II. Antenna Design
The software part of our design antenna around determination of the surface current distribution and
return loss curve (S11vs frequency) of several simple rectangular patch antennas. From the transmission line
model of rectangular patch antennas it is clear that the three essential parameters for the design of a rectangular
Microstrip Patch Antenna are as follows: Frequency of operation (f0 =1.9 GHz). Dielectric constant of the
substrate (εr = 2.2) and height of dielectric substrate thickness (h =1.5748mm).
Design Procedure [3]
The geometry of proposed antenna is shown in Figure (1). The design consists of rectangular Microstrip
Patch Antenna with etched E- shape on it. Calculating the wavelength (λ), because the light speed C = 3x108
and 𝑓0 = 1.9 GHz, So λ = C /𝑓0, we get λ=0.157m =157mm. The E-shaped rectangular patch antenna was
fabricated, simulated using Zealand IED3 simulator. The basic geometry of the E-shaped antenna element is
shown in Fig.1. The rectangular patch, with width W and length L is supported by a low dielectric superstrate
with dielectric permittivity ϵ1 and thickness h1, an air-filled substrate with dielectric permittivity ϵ0 = 1 and
thickness h0 = 15mm is sandwiched between the superstrate and a ground plane. The proposed patch integrates
the E-shaped patch that adjusting the length ɭ , width w1, and positions dp of the slots one can obtain satisfactory
performance and control the bandwidth. By properly adjusting the parameters of slots and the position of the
feeding point, a 27 % antenna bandwidth is achieved. An elegant approach for the parameter selection would be
the utilization of modern genetic algorithms [4]..
The computer simulation of the proposed linear array antenna was performed using MATLAB [5] and
the calculated parameters are shown in Table1[4,5]. The calculations used are described below. Since the two
basic factors influencing the performance of the linear array antenna, i.e., the inter-element spacing and the
number of elements in an array are fixed in our analysis. We properly selected the size of the patches and the
position of the feeding point. The initial dimensions L, W of the E-shaped patch antenna can be determined
using the following equations, which are valid for the rectangular patch antenna [4,5]:
The width of the Microstrip patch antenna is given as: w = c (2 f° εr + 1 / 2) = 62.4 mm (1)
The effective length is: Leff = C (2 f° εreff ) = 52.23 mm ;
The length extension is:
△ L = (0.412 h) εreff + 0.3 ∗ (W h) + 0.264 εreff − 0.258 ∗ (W h) + 0.8
The actual length is obtained by: L = Leff − 2 △ L = 50.6 mm (2)
Calculation of the ground plane dimensions (Lg and Wg):
The transmission line model is applicable to infinite ground planes only. However, for practical
considerations, it is essential to have a finite ground plane. It has been shown by [6] that similar results for finite
and infinite ground plane can be obtained if the size of the ground plane is greater than the patch dimensions by
approximately six times the substrate thickness all around the periphery. Hence, for this design, the ground plane
dimensions would be given as:
𝐿 𝑔 = 6 + 𝐿 = 6 1.5748 + 50.6 = 59.6 ≈ 60 𝑚𝑚
𝑤 𝑔 = 6 + 𝑤 = 6 1.5748 + 62.4 = 71.8 ≈ 72 𝑚𝑚
This design employs contemporary techniques namely, the coaxial probe feeding , patch, and slotted patch
techniques to meet the design requirement. The use of probe feeding technique with a thick air-filled substrate
provides the bandwidth enhancement, while the application of substrate with radiating patch offers a gain
enhancement, and the use of parallel slots also reduce the size of the patch [3,7].
The proposed patch integrates with slot on the same radiating element are embedded in parallel on the
radiating edge of the patch symmetrically with respect to the centerline of the patch.
3. Design and Analysis of Microstrip Antenna for CDMA systems Communication
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Table 1: Optimize Parameters for E-Shaped Patch Antenna.
Superstrate RT 5880 (εr =2.2, h =1.5748mm)
Substrate Air Air (ε0 =1, h0 =15 mm)
Rectangular patch Width and Length, {W, L} = {62.4, 50.6} mm
Feed Position dp= 2.8 mm from bottom edge along y axis (centre line of the patch), hole = 0.7mm
Slots parameters {ɭ , w2, w1 } = {44.5, 8, 9} mm
An Aluminum plate with dimensions of 60 x 72 x1 mm and thickness of 1 mm is used as a ground plane.
III. Simulation Process And Results Analysis
In this paper we have Simulation and Fabricated in systematic way and finally measured on Spectrum
analyzer. The proposed antenna element is analyzed using the full-wave MoM technique with the aid of the
zeland-IE3D full-wave electromagnetic simulator [8]. To calculate return loss, VSWR, impedance bandwidth,
Current distribution, antenna efficiency and gains. Fig. (2) Shows the simulated return loss (S11) parameter is
better than -10dB within the frequency range of (1.83-1.99) GHz, which means 27% band-width enhancement.
Fig. (3) shows the simulated result of the VSWR of the proposed antenna. The minimum value of VSWR should
be less than 2 (VSWR≤2) for desirable communication is about 1.83 -2 GHz. The closely excited resonant
frequencies at 1.9 GHz as shown in the figure gives the measure of the characteristic of the patch antenna. Fig.
(4) Shows the simulated gain of the proposed patch antenna at various frequencies is shown in the figure, the
maximum achievable gain is 3 dBi at the frequency of 1.9 GHz and the gain variation is 1dBi between the
frequency ranges of 1.85 GHz to 1.99 GHz. Fig.(5) Shows the simulated Radiation Pattern Plot. Fig. (6) Shows
that the surface current distribution, including the current flow on slotted area of the patch. Due to identical
manner of current flow on the antenna, only current distribution on the resonant frequency is depicted in the
figure. Arrows show the direction of the current distribution. It can be observed from the figure that the current
intensely flows at the edge of the slots especially near the feeding probe of the patch. However, the current is
uniformly distributed elsewhere. Fig.(7) Shows that the simulated radiation efficiency and antenna efficiency of
the proposed antenna at (1.83 - 2) GHz. The radiation pattern efficiency displays good broadside radiation
patterns is 65 % at most of frequency band. The proposed patch antenna efficiency is 60% at most of frequency
band.
IV. Conclusion
A new E shaped patch for enhancing bandwidth of microstrip patch antenna is successfully designed
in this paper. By employing proposed slotted patch shaped design and coaxial probe feeding techniques, an
impedance bandwidth of 27% is achieved in this design with respect to the centre frequency of 1.9 GHz. In
addition, good antenna gain and radiation characteristics have also been obtained. The proposed microstrip patch
antenna achieves a fractional bandwidth of 27% (1.83 - 2) GHz at 10 dB return loss covering the CDMA
systems band. The maximum achievable gain of the antenna is 3dBi with gain variation of 1.3 dBi.
The developed element can be used in mobile communication systems (CDMA system (PCS)) with
stable manner. The proposed element is designed and simulated using the method of moment (MoM)
technique with the aid of the zeland-IE3D full-wave electromagnetic simulator. The radiation pattern shows the
broad-side E-shape that is suitable for such systems with gain value that exceeds 3 dBi at 1 . 9 GHz.
Better radiation performance is achieved by embedding slot onto the patch (E-shaped) while the use of patch
improves the gain of the antenna. The composite effect of integrating these techniques offers a low profile,
broadband, high gain, and compact antenna element suitable for array applications.
Reference:
[1] G. Guru Prasad, G. Madhavi Latha, V. Charishma,"Design and Analysis of 8x1 Array Microstrip Patch Antenna Using IE3D” ,
International Journal of Engineering and Innovative Technology (IJEIT)Volume 1, Issue 3, March 2012.
[2] Sanchez-Hernandez, D., Robertson, I. D.,“A Survey of Broadband Microstrip Patch Antennas”. Microwave Journal, Sept. 1996, pp.
60-82.
[3] F. Yang, X. Zhang, Y. Rahmat-Samii, “Wide-band E-shaped patch antennas for wireless communications,” IEEE Trans. Antennas
Propagation, vol. 49, pp. 1094-1100, july2001 .
[4] Godara Lal Chand."Handbook of Antennas in Wireless Communications", Boca Raton London New York CRC Press, 2002.
[5] J. Davalos Guzman, S. Gomez Ochoa, N. Ramirez Hernandez, J. L. Ramos Quirarte, “MATLAB Tool for Analysis and Design of
Linear and Planar Antenna Arrays”, 1st International Congress on Instrumentation and Applied Sciences, Cancun Q.R. Mexico,
October 26-29, 2010.
[6] C. A. Balanis, “Antenna Theory, Analysis and Design,” John Wiley & Sons, New York, 2005.
[7] M. Tariqul Islam, M.N. Shakib, N. Misran., and B. Yatim, “ Analysis of L-Probe Fed Slotted Microstrip Patch Antenna,” in Eleventh
IEEE International Conference on Communicat-ion Systems (IEEE ICCS 2008), Guangzhou, China, pp. 380-383, November 19-21,
2008.
[8] Milligan, T.A.,"Modern Antenna Design", John Wiley & Sons Publication, New Jersey, 2005.http://www.zeland.com
4. Design and Analysis of Microstrip Antenna for CDMA systems Communication
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Fig. 2: The return loss S11 parameter.
E-shape microstrip patch antenna
Fig. 3: Simulated VSWR of the proposed patch
antenna is 1.25 at f =1.9GHz.
Fig. 4: 2D view the radiation pattern,
at Gain = 3; 2 dBi at f = 1.9 GHz;
Fig. 5: 3D view of radiation pattern looking along Z
axis in the X-Y Plane.
Fig.1: Geometry of E-shaped MSA,
(a) Top view
Fig.1. (b) Side view Fig.1. (c) Developed for
fabrications.
0
h1
RTD 5880
Substrate
RTD
5. Design and Analysis of Microstrip Antenna for CDMA systems Communication
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Fig..6. Simulated current distributions on the E-shaped
patch of antenna at 1.9GHz.
Fig. 7. Simulated the total antenna efficiency and
radiation efficiency.