The document summarizes a study on the effect of substrate materials on the performance of an ultra-wideband (UWB) antenna. A circularly polarized UWB antenna was designed using FR4 substrate and fed by a coplanar waveguide. Simulations were performed in HFSS to analyze the antenna's return loss, voltage standing wave ratio (VSWR), input impedance, gain, and radiation patterns at different resonant frequencies. The performance was also compared for different substrate materials, and FR4 provided the best results with a 9.745 GHz bandwidth. Key findings included FR4 achieving less than -10 dB return loss and VSWR below 2 across the operating band with a maximum gain of 4.5 dBi and quasi
Compact Rectangular Slot Microstrip Antenna with Band-Notched Characteristics...jmicro
n this paper, we present an offset microstrip-fed ultraw
ideband antenna with band notch
characteristics.The antenna structure consists of rectangular r
adiating patch and ground plane with
rectangular shaped slot, which increases impedance bandwidth upto 1
17.73%(2.9-11.2GHz).A new
modified U slot is etched in the radiating patch to create band-
notched properties in the WiMAX (3.3-
3.7GHz) and C-band satellite communication (3.7-4.15GHz).Further
more, parametric studies have been
conducted using EM simulation software CADFEKO suite(7.0) and
optimized with stable radiation pattern
which satisfied UWB requirement for VSWR<2.A prototype of ante
nna is fabricated on 1.6mm thick FR-4
substrate with dielectric constant of 4.4 and loss tangent of 0.02
.The designed antenna exhibits
bidirectional and omni directional radiation patterns along E and
H-plane with stable gain and efficiency
over entire operating band except notch frequency band. Simulated res
ults are in good agreement with the
measured results of the proposed antenna which makes it a good
candidate for UWB application.
International Journal of Computational Engineering Research(IJCER)ijceronline
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology.
STUDY OF ARRAY BI-CONICAL ANTENNA FOR DME APPLICATIONSijwmn
This paper introduces a new configuration of array bi-conical antenna to enhance the gain of an antenna for Distance Measuring Equipment (DME) avionic system. Due to its large size, the antenna can be placed in terrestrials DME stations. The antenna consists of the bi-conical elements placed in a linear configuration. The simulated maximum gain is 10.2dB, the antenna operates in the DME band (960 – 1215 MHz). Al the simulations are performed with CADFEKO a Method of Moments based Solver.
Multiband Circular Microstrip Patch Antenna for WLAN Applicationtheijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
A Compact Multiple Band-Notched Planer Antenna with Enhanced Bandwidth Using ...Radita Apriana
UWB antenna with dual notched characteristics fed by microstrip transmission line is presented in
this paper. The tapered connection between the rectangular patch and the feed line is used to produce a
good impedance matching from 2.3 to 11.5 GHz. A dual band frequency notches are achieved using UDGS
loaded with lumped capacitors. The first notch frequency band is achieved using DGS to reduce the
interference with WIMAX from 3.3 to 3.7 Ghz. The second notch frequency band is also achieved using Uparasitic
strip placed in the ground plan to eliminate the interference with WLAN from 5.2 to 5.9 GHz.
Lumped capacitors are combined with the slot due to miniaturize the slot size. The size of the resonator is
reduced by more than 40% when lumped capacitors are used. The proposed antenna hasVSWR < 2
except the notched bands. The simulated results confirm that the antenna is suitable for UWB applications.
Compact Rectangular Slot Microstrip Antenna with Band-Notched Characteristics...jmicro
n this paper, we present an offset microstrip-fed ultraw
ideband antenna with band notch
characteristics.The antenna structure consists of rectangular r
adiating patch and ground plane with
rectangular shaped slot, which increases impedance bandwidth upto 1
17.73%(2.9-11.2GHz).A new
modified U slot is etched in the radiating patch to create band-
notched properties in the WiMAX (3.3-
3.7GHz) and C-band satellite communication (3.7-4.15GHz).Further
more, parametric studies have been
conducted using EM simulation software CADFEKO suite(7.0) and
optimized with stable radiation pattern
which satisfied UWB requirement for VSWR<2.A prototype of ante
nna is fabricated on 1.6mm thick FR-4
substrate with dielectric constant of 4.4 and loss tangent of 0.02
.The designed antenna exhibits
bidirectional and omni directional radiation patterns along E and
H-plane with stable gain and efficiency
over entire operating band except notch frequency band. Simulated res
ults are in good agreement with the
measured results of the proposed antenna which makes it a good
candidate for UWB application.
International Journal of Computational Engineering Research(IJCER)ijceronline
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology.
STUDY OF ARRAY BI-CONICAL ANTENNA FOR DME APPLICATIONSijwmn
This paper introduces a new configuration of array bi-conical antenna to enhance the gain of an antenna for Distance Measuring Equipment (DME) avionic system. Due to its large size, the antenna can be placed in terrestrials DME stations. The antenna consists of the bi-conical elements placed in a linear configuration. The simulated maximum gain is 10.2dB, the antenna operates in the DME band (960 – 1215 MHz). Al the simulations are performed with CADFEKO a Method of Moments based Solver.
Multiband Circular Microstrip Patch Antenna for WLAN Applicationtheijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
A Compact Multiple Band-Notched Planer Antenna with Enhanced Bandwidth Using ...Radita Apriana
UWB antenna with dual notched characteristics fed by microstrip transmission line is presented in
this paper. The tapered connection between the rectangular patch and the feed line is used to produce a
good impedance matching from 2.3 to 11.5 GHz. A dual band frequency notches are achieved using UDGS
loaded with lumped capacitors. The first notch frequency band is achieved using DGS to reduce the
interference with WIMAX from 3.3 to 3.7 Ghz. The second notch frequency band is also achieved using Uparasitic
strip placed in the ground plan to eliminate the interference with WLAN from 5.2 to 5.9 GHz.
Lumped capacitors are combined with the slot due to miniaturize the slot size. The size of the resonator is
reduced by more than 40% when lumped capacitors are used. The proposed antenna hasVSWR < 2
except the notched bands. The simulated results confirm that the antenna is suitable for UWB applications.
PLANAR ACS FED DUAL BAND ANTENNA WITH DGS FOR WIRELESS APPLICATIONS jantjournal
A novel Asymmetric Coplanar Strip (ACS) fed antenna with Defected Ground Structure (DGS) suitable for dual application is presented. The Method of Moments (MoM) based mentor graphics IE3D electromagnetic solver has been used for this design. Dual band operation has been obtained by modifying the ground plane of the proposed design with spur-slots. It has been fabricated and tested with the overall size of 21x15x1.6 mm3 The measured results indicate that the proposed antenna yields <-10dB impedance bandwidth of 13.13% and 9.86% which meets the requirement of 3.5GHz and 5.5GHz Wireless Local Area Network (WLAN) and World Wide Interoperability
Microwave Access (WiMAX) applications. The approximate lumped equivalent circuit extraction for the proposed DGS fed dual band antenna has been discussed in detail. Because of its stable radiation patterns with low cross polarization,miniature size, high average antenna gain of 2.5dBi and good electromagnetic characteristics, the proposed antenna is a promising candidate for dual mode wireless communication devices.
Proposed P-shaped Microstrip Antenna Array for Wireless Communication Applica...TELKOMNIKA JOURNAL
In this paper a P-shaped microstrip antenna array is proposed for X-band applications in the
frequency range (8.1567-9.3811) GHz .The gain obtained in this frequency range is about 8.305 dBi.
The reflection coefficient is less than - 10 dB in the above frequency range. The simulation results were
obtained for the optimum parameters using the CST software while the practical test was carried out using
Vector Network Analyzer (VNA). The microstrip antenna was manufactured using FR-4 substrate with
relative dielectric constant of 4.3 and loss tangent 푡푎푛 훿 = 0.002.The simulation and practical results were
compared. The size of the antenna array is (33 × 70 × 1.6) 푚푚3. This array is suitable for satellite
communication, radar application.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
Improved Vivaldi Antenna with Radiation Pattern Control FeaturesTELKOMNIKA JOURNAL
Vivaldi antenna has been considered as a mitigation to the scattering effect of an antenna.
However, the current performance of Vivaldi antenna suffers from multipath effect, interfering signals and
radiation pattern control. This paper proposed an improved Vivaldi antenna which combined triple radiating
slot to enable control of radiation pattern features. This is accomplished by controlling the position of the
radiating element through the asymmetric arrangement of ideal switches to steer the beam in three
desired-directions. The Using operating frequency lied between 900 MHz and 2.5GHz, the proposed
design was fabricated and tested. Depending on the radiating element, the proposed anten na covered
about ±90º with an almost equal gain at the three different focal in contrast to ±45º coverage of traditional
rectangular microstrip antenna beam. The results satisfied pattern reconfigurability and the proposed
design can be very useful for wireless communications where multipath fading problems are frequently
encountered.
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.
Modified Ultra Wideband (UWB) Antipodal Vivaldi Antenna for 5G IJECEIAES
This paper presents a half triangular Comb-shaped slits edge Antipodal Vivaldi Antenna (Comb-AVA) as compared to the conventional Antipodal Vivaldi Antenna (AVA) design. This proposed antenna covers 20-40 GHz spectrum. This Comb-AVA antenna is designed for the 5G application which is addressed to cover a dualband 28/38 GHz frequencies. A half triangular comb-shaped slits edge structure is employed to investigate its effects on antenna parameters. This proposed Comb-AVA occupies a 25x8 mm of FR 4 substrate (휀 = 4.4, tan δ=0.02, thinkness 1.6 mm). It has impedance bandwidth (S 훾 ≤-10 dB) along 20-40 GHz spectrum and fractional bandwidth (FBW) ≥ 0.5. It means that the bandwidth is categorized as ultra wideband (UWB). In addition, there is 11 dB refinement of return loss in the CombAVA design at 38 GHz frequency. VSWR value is in range of 1.054 to 1.396. This proposed antena also has a wider angular width (3 dB) than the AVA. Higher directivity and gain is generated by Comb-AVA at 28 GHz. This proposed antenna has good performances and suitable for 5G application.
Villa Alhambra Locks Presentation 11-5-2011VillaAlhambra
Presentation on decaying and corroding townhome exterior gate locks at Villa Alhambra. Presented to the board at the Villa Alhambra Board of Directors meeting on November 5, 2011.
A CPW-Fed Wideband And Multiband Rectangular Microstrip Patch Antenna For Wir...IJMER
In this paper a rectangular patch antenna is proposed for both the multiband and wide band
operations with a coplanar waveguide (CPW) feeding. The proposed antenna has a size of
30x40x1.57mm3 including the ground plane and it is designed on FR4 substrate with a dielectric constant
of 4.4. The proposed antenna resonates at four distinct frequency bands, centered at 3.03, 4.84, 7.94 and
8.85 GHz. The return loss for the above mentioned frequency bands can be controlled and can be
adjusted with parametric analysis of E-slot. The various terms and parameters associated with the
antenna like return loss, radiation patterns, VSWR, current distributions and gain are analyzed and are
optimized by the simulations carried out using finite element method based Ansoft High Frequency
Structural Simulator(HFSS).
PLANAR ACS FED DUAL BAND ANTENNA WITH DGS FOR WIRELESS APPLICATIONS jantjournal
A novel Asymmetric Coplanar Strip (ACS) fed antenna with Defected Ground Structure (DGS) suitable for dual application is presented. The Method of Moments (MoM) based mentor graphics IE3D electromagnetic solver has been used for this design. Dual band operation has been obtained by modifying the ground plane of the proposed design with spur-slots. It has been fabricated and tested with the overall size of 21x15x1.6 mm3 The measured results indicate that the proposed antenna yields <-10dB impedance bandwidth of 13.13% and 9.86% which meets the requirement of 3.5GHz and 5.5GHz Wireless Local Area Network (WLAN) and World Wide Interoperability
Microwave Access (WiMAX) applications. The approximate lumped equivalent circuit extraction for the proposed DGS fed dual band antenna has been discussed in detail. Because of its stable radiation patterns with low cross polarization,miniature size, high average antenna gain of 2.5dBi and good electromagnetic characteristics, the proposed antenna is a promising candidate for dual mode wireless communication devices.
Proposed P-shaped Microstrip Antenna Array for Wireless Communication Applica...TELKOMNIKA JOURNAL
In this paper a P-shaped microstrip antenna array is proposed for X-band applications in the
frequency range (8.1567-9.3811) GHz .The gain obtained in this frequency range is about 8.305 dBi.
The reflection coefficient is less than - 10 dB in the above frequency range. The simulation results were
obtained for the optimum parameters using the CST software while the practical test was carried out using
Vector Network Analyzer (VNA). The microstrip antenna was manufactured using FR-4 substrate with
relative dielectric constant of 4.3 and loss tangent 푡푎푛 훿 = 0.002.The simulation and practical results were
compared. The size of the antenna array is (33 × 70 × 1.6) 푚푚3. This array is suitable for satellite
communication, radar application.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
Improved Vivaldi Antenna with Radiation Pattern Control FeaturesTELKOMNIKA JOURNAL
Vivaldi antenna has been considered as a mitigation to the scattering effect of an antenna.
However, the current performance of Vivaldi antenna suffers from multipath effect, interfering signals and
radiation pattern control. This paper proposed an improved Vivaldi antenna which combined triple radiating
slot to enable control of radiation pattern features. This is accomplished by controlling the position of the
radiating element through the asymmetric arrangement of ideal switches to steer the beam in three
desired-directions. The Using operating frequency lied between 900 MHz and 2.5GHz, the proposed
design was fabricated and tested. Depending on the radiating element, the proposed anten na covered
about ±90º with an almost equal gain at the three different focal in contrast to ±45º coverage of traditional
rectangular microstrip antenna beam. The results satisfied pattern reconfigurability and the proposed
design can be very useful for wireless communications where multipath fading problems are frequently
encountered.
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.
Modified Ultra Wideband (UWB) Antipodal Vivaldi Antenna for 5G IJECEIAES
This paper presents a half triangular Comb-shaped slits edge Antipodal Vivaldi Antenna (Comb-AVA) as compared to the conventional Antipodal Vivaldi Antenna (AVA) design. This proposed antenna covers 20-40 GHz spectrum. This Comb-AVA antenna is designed for the 5G application which is addressed to cover a dualband 28/38 GHz frequencies. A half triangular comb-shaped slits edge structure is employed to investigate its effects on antenna parameters. This proposed Comb-AVA occupies a 25x8 mm of FR 4 substrate (휀 = 4.4, tan δ=0.02, thinkness 1.6 mm). It has impedance bandwidth (S 훾 ≤-10 dB) along 20-40 GHz spectrum and fractional bandwidth (FBW) ≥ 0.5. It means that the bandwidth is categorized as ultra wideband (UWB). In addition, there is 11 dB refinement of return loss in the CombAVA design at 38 GHz frequency. VSWR value is in range of 1.054 to 1.396. This proposed antena also has a wider angular width (3 dB) than the AVA. Higher directivity and gain is generated by Comb-AVA at 28 GHz. This proposed antenna has good performances and suitable for 5G application.
Villa Alhambra Locks Presentation 11-5-2011VillaAlhambra
Presentation on decaying and corroding townhome exterior gate locks at Villa Alhambra. Presented to the board at the Villa Alhambra Board of Directors meeting on November 5, 2011.
A CPW-Fed Wideband And Multiband Rectangular Microstrip Patch Antenna For Wir...IJMER
In this paper a rectangular patch antenna is proposed for both the multiband and wide band
operations with a coplanar waveguide (CPW) feeding. The proposed antenna has a size of
30x40x1.57mm3 including the ground plane and it is designed on FR4 substrate with a dielectric constant
of 4.4. The proposed antenna resonates at four distinct frequency bands, centered at 3.03, 4.84, 7.94 and
8.85 GHz. The return loss for the above mentioned frequency bands can be controlled and can be
adjusted with parametric analysis of E-slot. The various terms and parameters associated with the
antenna like return loss, radiation patterns, VSWR, current distributions and gain are analyzed and are
optimized by the simulations carried out using finite element method based Ansoft High Frequency
Structural Simulator(HFSS).
DESIGN & PARAMETRIC STUDY OF RECTANGULAR SLOT MICROSTRIP PATCH ANTENNA FOR UW...IJEEE
A Microstrip fed antenna which consists of a
rectangular patch with rectangular shaped slot incorporated
into patch is presented for ultra wide band application with
enhanced bandwidth. The proposed antenna achieves an
impedance bandwidth of 8.9GHz (2.3-11.2GHz) with
VSWR< 2 for over the entire bandwidth.
Compact Rectangular Slot Microstrip Antenna with Band-Notched Characteristics...jmicro
In this paper, we present an offset microstrip-fed ultrawideband antenna with band notch
characteristics.The antenna structure consists of rectangular radiating patch and ground plane with
rectangular shaped slot, which increases impedance bandwidth upto 117.73%(2.9-11.2GHz).A new
modified U slot is etched in the radiating patch to create band-notched properties in the WiMAX (3.3-
3.7GHz) and C-band satellite communication (3.7-4.15GHz).Furthermore, parametric studies have been
conducted using EM simulation software CADFEKO suite(7.0) and optimized with stable radiation pattern
which satisfied UWB requirement for VSWR<2.A prototype of antenna is fabricated on 1.6mm thick FR-4
substrate with dielectric constant of 4.4 and loss tangent of 0.02.The designed antenna exhibits
bidirectional and omni directional radiation patterns along E and H-plane with stable gain and efficiency
over entire operating band except notch frequency band. Simulated results are in good agreement with the
measured results of the proposed antenna which makes it a good candidate for UWB application.
Microstrip patch antenna for pcs and wlaneSAT Journals
Abstract Due to development in wireless devices, it poses a new challenge for the design of an antenna in wireless communication. Patch antennas are well suited for various wireless application systems due to their low weight, low profile, versatility, conformability, low cost and low sensitivity to manufacturing tolerances. This paper present design, simulation of a rectangular micro strip antenna for WLAN and PCS. The aim of the work is to design reliable broadband, compact patch antenna for wireless devices. Antenna is proposed which is providing circular polarization, dual band, resonant frequencies at 1.9 GHz, 2.4 GHz. Key Words: Patch antenna, co-axial feeding, polarization, dual band, HFSS …
PLANAR ACS FED DUAL BAND ANTENNA WITH DGS FOR WIRELESS APPLICATIONSjantjournal
A novel Asymmetric Coplanar Strip (ACS) fed antenna with Defected Ground Structure (DGS) suitable for dual application is presented. The Method of Moments (MoM) based mentor graphics IE3D electromagnetic solver has been used for this design. Dual band operation has been obtained by modifying the ground plane of the proposed design with spur-slots. It has been fabricated and tested with the overall size of 21x15x1.6 mm3. The measured results indicate that the proposed antenna yields <-10dB impedance bandwidth of 13.13% and 9.86% which meets the requirement of 3.5GHz and 5.5GHz Wireless Local Area Network (WLAN) and World Wide Interoperability Microwave Access (WiMAX) applications. The approximate lumped equivalent circuit extraction for the proposed DGS fed dual band antenna has been discussed in detail. Because of its stable radiation patterns with low cross polarization,miniature size, high average antenna gain of 2.5dBi and good electromagnetic characteristics, the proposed antenna is a promising candidate for dual mode wireless communication devices.
PLANAR ACS FED DUAL BAND ANTENNA WITH DGS FOR WIRELESS APPLICATIONSjantjournal
A novel Asymmetric Coplanar Strip (ACS) fed antenna with Defected Ground Structure (DGS) suitable for dual application is presented. The Method of Moments (MoM) based mentor graphics IE3D electromagnetic solver has been used for this design. Dual band operation has been obtained by modifying the ground plane of the proposed design with spur-slots. It has been fabricated and tested with the overall size of 21x15x1.6 mm3. The measured results indicate that the proposed antenna yields <-10dB impedance bandwidth of 13.13% and 9.86% which meets the requirement of 3.5GHz and 5.5GHz Wireless Local Area Network (WLAN) and World Wide Interoperability Microwave Access (WiMAX) applications. The approximate lumped equivalent circuit extraction for the proposed DGS fed dual band antenna has been discussed in detail. Because of its stable radiation patterns with low cross polarization,miniature size, high average antenna gain of 2.5dBi and good electromagnetic characteristics, the proposed antenna is a promising candidate for dual mode wireless communication devices.
PLANAR ACS FED DUAL BAND ANTENNA WITH DGS FOR WIRELESS APPLICATIONS jantjournal
A novel Asymmetric Coplanar Strip (ACS) fed antenna with Defected Ground Structure (DGS) suitable for dual application is presented. The Method of Moments (MoM) based mentor graphics IE3D electromagnetic solver has been used for this design. Dual band operation has been obtained by modifying the ground plane of the proposed design with spur-slots. It has been fabricated and tested with the overall size of 21x15x1.6 mm3. The measured results indicate that the proposed antenna yields <-10dB impedance bandwidth of 13.13% and 9.86% which meets the requirement of 3.5GHz and 5.5GHz Wireless Local Area Network (WLAN) and World Wide Interoperability Microwave Access (WiMAX) applications. The approximate lumped equivalent circuit extraction for the proposed DGS fed dual band antenna has been discussed in detail. Because of its stable radiation patterns with low cross polarization,miniature size, high average antenna gain of 2.5dBi and good electromagnetic characteristics, the proposed antenna is a promising candidate for dual mode wireless communication devices.
PLANAR ACS FED DUAL BAND ANTENNA WITH DGS FOR WIRELESS APPLICATIONS jantjournal
A novel Asymmetric Coplanar Strip (ACS) fed antenna with Defected Ground Structure (DGS) suitable for dual application is presented. The Method of Moments (MoM) based mentor graphics IE3D electromagnetic solver has been used for this design. Dual band operation has been obtained by modifying the ground plane of the proposed design with spur-slots. It has been fabricated and tested with the overall size of 21x15x1.6 mm3. The measured results indicate that the proposed antenna yields <-10dB impedance bandwidth of 13.13% and 9.86% which meets the requirement of 3.5GHz and 5.5GHz Wireless Local Area Network (WLAN) and World Wide Interoperability Microwave Access (WiMAX) applications. The approximate lumped equivalent circuit extraction for the proposed DGS fed dual band antenna has been discussed in detail. Because of its stable radiation patterns with low cross polarization,miniature size, high average antenna gain of 2.5dBi and good electromagnetic characteristics, the proposed antenna is a promising candidate for dual mode wireless communication devices.
PLANAR ACS FED DUAL BAND ANTENNA WITH DGS FOR WIRELESS APPLICATIONSjantjournal
A novel Asymmetric Coplanar Strip (ACS) fed antenna with Defected Ground Structure (DGS) suitable for dual application is presented. The Method of Moments (MoM) based mentor graphics IE3D electromagnetic solver has been used for this design. Dual band operation has been obtained by modifying the ground plane of the proposed design with spur-slots. It has been fabricated and tested with the overall size of 21x15x1.6 mm3. The measured results indicate that the proposed antenna yields <-10dB impedance bandwidth of 13.13% and 9.86% which meets the requirement of 3.5GHz and 5.5GHz Wireless Local Area Network (WLAN) and World Wide Interoperability Microwave Access (WiMAX) applications. The approximate lumped equivalent circuit extraction for the proposed DGS fed dual band antenna has been discussed in detail. Because of its stable radiation patterns with low cross polarization,miniature size, high average antenna gain of 2.5dBi and good electromagnetic characteristics, the proposed antenna is a promising candidate for dual mode wireless communication devices.
PLANAR ACS FED DUAL BAND ANTENNA WITH DGS FOR WIRELESS APPLICATIONSjantjournal
A novel Asymmetric Coplanar Strip (ACS) fed antenna with Defected Ground Structure (DGS) suitable for dual application is presented. The Method of Moments (MoM) based mentor graphics IE3D electromagnetic solver has been used for this design. Dual band operation has been obtained by modifying the ground plane of the proposed design with spur-slots. It has been fabricated and tested with the overall size of 21x15x1.6 mm3. The measured results indicate that the proposed antenna yields <-10dB impedance bandwidth of 13.13% and 9.86% which meets the requirement of 3.5GHz and 5.5GHz Wireless Local Area Network (WLAN) and World Wide Interoperability Microwave Access (WiMAX) applications. The approximate lumped equivalent circuit extraction for the proposed DGS fed dual band antenna has been discussed in detail. Because of its stable radiation patterns with low cross polarization,miniature size, high average antenna gain of 2.5dBi and good electromagnetic characteristics, the proposed antenna is a promising candidate for dual mode wireless communication devices.
PLANAR ACS FED DUAL BAND ANTENNA WITH DGS FOR WIRELESS APPLICATIONSjantjournal
A novel Asymmetric Coplanar Strip (ACS) fed antenna with Defected Ground Structure (DGS) suitable for dual application is presented. The Method of Moments (MoM) based mentor graphics IE3D electromagnetic solver has been used for this design. Dual band operation has been obtained by modifying the ground plane of the proposed design with spur-slots. It has been fabricated and tested with the overall size of 21x15x1.6 mm3. The measured results indicate that the proposed antenna yields <-10dB impedance bandwidth of 13.13% and 9.86% which meets the requirement of 3.5GHz and 5.5GHz Wireless Local Area Network (WLAN) and World Wide Interoperability Microwave Access (WiMAX) applications. The approximate lumped equivalent circuit extraction for the proposed DGS fed dual band antenna has been discussed in detail. Because of its stable radiation patterns with low cross polarization,miniature size, high average antenna gain of 2.5dBi and good electromagnetic characteristics, the proposed antenna is a promising candidate for dual mode wireless communication devices.
Semi-circular compact CPW-fed antenna for ultra-wideband applicationsTELKOMNIKA JOURNAL
This paper presents a simple structure and small size antenna design with dimensions of 43×47 mm2 to perform an ultra-wideband (UWB) frequency range using a semicircular co-planar waveguide (CPW). This antenna has been designed and simulated by the computer simulation technology (CST) microwave studio suit. In this work, we design an ultra-wideband antenna (about 2 GHz to 10 GHz) by feeding a semi-circular compact antenna via a co-planar waveguide for input impedance of 50 Ω. The CST simulation results show that our designed antenna has a very good impedance and radiation characteristic within the intended ultra-wideband. Because of the small size and the suitable shape, this antenna can be used in many wireless communication applications, such as a radio frequency identifier (RFID), indoor wireless local area network or wireless fidelity (WiFi), internet of things (IoT), millimeter waves communications (mmWave), global positioning system (GPS), and many applications of 6G systems.
Microstrip Antenna Design For Ultra-Wide Band Applicationsinventionjournals
: In this paper design of ultra-wide band (UWB) antenna. The UWB antenna is capable of operating over an UWB as allocated by the Federal Communications Commission (FCC) with good radiation properties over the entire frequency range. The techniques of enhancing the bandwidth of microstrip UWB antenna were utilized to enhance them performance of the designed antenna. The (UWB) antenna with substrate FR4epoxy having dielectric constant 4.4 and substrate height of 1.6mm is designed and analyzed with different parameters like VSWR, Gain, Peak directivity, Return losses, Bandwidth etc,.The rectangular patch has two slots one slot at the topmost left corner another one at bottom right corner. The simulated bandwidth with return loss (RL) ≥ 10 dB is 2.2–5.6GHz. The simulated results of the proposed antenna indicate higher gain at the passbands while a sharp drop at the rejected bands is seen. The radiation pattern is of dipole shape in the Eplane and almost omnidirectional in the H-plane. The high frequency structure simulator HFSS (High Frequency Structure Simulator) version 13.0 software is used to design and simulate the antennas behavior over the different frequency ranges. Measurements confirm the antenna characteristic as predicted in the simulation with a slight shift in frequencies.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
SAP Sapphire 2024 - ASUG301 building better apps with SAP Fiori.pdfPeter Spielvogel
Building better applications for business users with SAP Fiori.
• What is SAP Fiori and why it matters to you
• How a better user experience drives measurable business benefits
• How to get started with SAP Fiori today
• How SAP Fiori elements accelerates application development
• How SAP Build Code includes SAP Fiori tools and other generative artificial intelligence capabilities
• How SAP Fiori paves the way for using AI in SAP apps
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UiPath Test Automation using UiPath Test Suite series, part 4
Aq03402520257
1. International Journal of Computational Engineering Research||Vol, 03||Issue, 4||
www.ijceronline.com ||April||2013|| Page 252
Study of the Effect of Substrate Materials on the Performance of
UWB Antenna
1
D.Ujwala, 2
D.S.Ramkiran, 3
N.Brahmani, 3
D.Sandhyarani, 3
K.Nagendrababu
1
Assistant Professor, Department of ECE, K L University
2
Associate Professor, Department of ECE, K L University
3
Students, B.Tech, Department of ECE, K L University
I. INTRODUCTION
Over the years, several studies used various antenna structures in Ultra wideband antenna design. The
UWB antenna, which is an essential part of the UWB system.UWB also refers to a broad frequency range
encompassing many narrow band frequencies, requires UWB antennas to transmit and receive throughout all
narrow band frequencies in the range. However, the allocated frequency band for the UWB is 3.1-12.6 GHz[1]
in between there exists a several wireless frequency bands such as WIMAX operates at 3.3-3.7 GHz and 5.8
GHz, IEEE 802.11a,WLAN operates at 5.15-5.35 and 5.725-5.825 GHz, downlink of X band satellite
communication operates at 7.25-7.75 GHz and ITU services operates at 8.025-8.4 GHz.
The conventional method is to cutting a slot on the patch, inserting a slit on patch. The typical shapes
of the patch antenna are circular, ellipse [2],[3]and rectangular[4],[5]. The main objective of this paper is to
design UWB with different substrate materials. Here, we are going to use fr4 as a best substrate material as it
gave best results regarding utilization of band width, resonating frequency and return loss. FR4 have good
fabrication process, good electrical insulator as its features. Fr4 is also used in relays, switches, washers and
transformers.Here we are going to use CPW feed.CPW is a transmission line system consisting of a central
current carrying trace on top of substrate. Coplanar with side grounds extending beyond a symmetric gap to
either side of the trace. Here we are going to use finite ground transmission line [6]. CPW has the same
advantage as micro strip, in that the signal is carried on an exposed surface trace, on which surface-mount
components can be attached and has little parasitic losses between surface mounted components and an
underlying ground plane. Both the radiating patch and the ground plane are beveled to cover the entire UWB
band from 3.1 to 12.6 GHz with VSWR less than 2. Characteristics of the proposed antenna are simulated using
HFSS.
II. ANTENNA DESIGN
The proposed antenna has dimensions of 26mm x 31.8 x 1.6mm. It is prototyped on FR4 substrate of
with dielectric constant, εr = 4.4 and fed by Coplanar Waveguide transmission line. The Geometrical parameters
are shown in Figure 1. The model consists of a circular patch of radius 10mm. The gap between ground plane
and patch is 0.4mm. To increase the performance of antenna two identical trapezoidal ground planes are
designed. The antenna parameters are as follows: Lsub=31.8mm, Wsub=26mm, R1=10mm, L1=8mm,
L2=10mm, L3=10.8mm, W1=4.3mm, g=0.4mm, Wf=2.6mm.
Abstract:
In this paper, a compact Ultra Wide Band antenna prototyped on FR4 Substrate is proposed
and analyzed. The antenna is fed by linearly tapered Co-planar waveguide (CPW) transmission line.
The parametric study is first performed on the feed of different substrate materials. The simulated
results of proposed antenna has an advantages of low power consumptions, security systems, tracking
applications, low data rate and low complexity. The simulation results for the voltage standing wave
ratio (VSWR), Return loss, Radiation pattern and Impedance matching are in good agreement with the
measurements. Moreover the Ultra wide band antennas enable the user to achieve a lower visual
profile, lower radar cross sections (RCS) and a lower space. The model is analyzed for different
substrate thicknesses using Finite Element Method based Ansoft High Frequency Structure Simulator
v.13.
Index Terms: CPW, FCC, VSWR, UWB.
2. Study Of The Effect Of Substrate Materials…
www.ijceronline.com ||April||2013|| Page 253
Figure 1: Proposed UWB Antenna Model
The antenna with the proposed geometry is analyzed using High Frequency Structure Simulator. It exhibits a
Voltage Standing Wave Ratio (VSWR) of less than 2 in the operating frequency range with less Return Loss
and acceptable Gain quasi omni-directional and bi-directional radiation patterns. A comparative analysis is
made by varying the substrate materials and its effect on Return Loss is observed.
III. RESULTS ANALYSIS
A CPW fed Ultra Wide Band antenna with a Circular shaped patch is simulated using HFSS. By
varying the substrate materials, the variations in Return Loss are observed and shown in Figure 2. Among the
substrate materials FR4, Teflon, Rogers RT/Duroid, Quartz, Polystyrene and Neltec, wide operating bandwidth
is obtained for FR4 substrate.
2.00 4.00 6.00 8.00 10.00 12.00 14.00
Freq [GHz]
-45.00
-40.00
-35.00
-30.00
-25.00
-20.00
-15.00
-10.00
-5.00
0.00
Y1
CPW fed UWB antennaReturnLoss for different substrate materials ANSOFT
Curve Info
Neltec)
Setup1 : Sweep1
FR4
Imported
RTduroid
Imported
Quartz
Imported
Teflon
Imported
polystyrene
Imported
Figure 2: Return Loss curves for different substrate materials
For different substrate materials, the corresponding bandwidth, resonant frequencies and their Return Losses are
shown in Table 1. The operating bandwidth of UWB antenna with FR4 Substrate is 9.745GHz from 2.9980GHz
– 12.7350GHz and resonated at frequencies 4.3356GHz, 7.4765GHz, 9.9732GHz, 12.1477GHz with a
corresponding Return Loss of -24.3854dB, -42.2670dB, -28.4086dB, -13.4235dB. The Frequency versus Return
Loss is shown in figure 3.
2.00 4.00 6.00 8.00 10.00 12.00 14.00
Frequency[GHz]
-45.00
-40.00
-35.00
-30.00
-25.00
-20.00
-15.00
-10.00
-5.00
0.00
s11
CPW fed UWB antennaReturn Loss ANSOFT
m1 m2
m3
m4
m6
m7
Curve Info
dB(St(Patch_T1,Patch_T1))
Setup1 : Sw eep1
Name X Y
m1 2.9900 -10.0824
m2 12.7350 -10.0616
m3 4.3356 -24.3854
m4 7.4765 -42.2670
m6 12.1477 -13.4235
m7 9.9732 -28.4086
Figure 3: Frequency vs. Reflection Coefficient
Figure 4 shows the Voltage Standing Wave Ratio plot and desirable VSWR is less than 2 and the proposed
design has VSWR<2 in the entire operating range. VSWR is a function of Reflection Coefficient and it
describes the power reflected from the antenna. The VSWR values at the resonant frequencies are 1.13, 1.02,
1.08 and 1.54 respectively.
3. Study Of The Effect Of Substrate Materials…
www.ijceronline.com ||April||2013|| Page 254
2.00 4.00 6.00 8.00 10.00 12.00 14.00
Frequency[GHz]
0.00
1.00
2.00
3.00
4.00
5.00
VSWR
CPW fed UWB antennaVSWR ANSOFT
m1
m2 m3
m4
Curve Info
VSWRt(Patch_T1)
Setup1 : Sweep1
Name X Y
m1 4.3356 1.1285
m2 7.4765 1.0155
m3 9.9732 1.0790
m4 12.1477 1.5420
Figure 4: VSWR vs. Frequency
The impedance of an antenna relates voltage to the current at the input to the antenna and hence called as Input
Impedance. The input impedance in smith chart is shown in Figure 5. The proposed model achieved an
impedance bandwidth of 21%.
Material
Dielectric
Constant
Band Width (GHZ)
Resonant Frequency
(GHZ)
Return loss (dB)
FR4 4.4
9.745
(2.9980-12.7350)
4.3356 -24.3854
7.4765 -42.2670
9.9732 -28.4086
12.1477 -13.4235
TEFLON 2.1
9.4893
(2.9000-12.3893)
5.3020 -27.7461
8.4430 -20.5721
11.1812 -16.6554
ROGERS RT
DUROID
2.2
9.552
(2.8980-12.4500)
5.2215 -24.8585
8.4430 -19.0736
11.1812 -17.6819
QUARTZ 3.78
8.28
(2.9700-12.1200)
4.4161 -27.2814
7.6376 -26.6020
10.2148 -21.5166
POLYSTYRENE 2.6
9
(2.9350-13.8230)
4.8993 -28.0574
8.2013 -20.8018
10.8591 -17.1622
NELTECH 3
8.91
(2.9400-12.8000)
4.5772 -28.2154
7.9597 -24.1389
10.6174 -21.4509
Table 1: Bandwidth, Resonant Frequencies and Return Loss for different substrate materials
Figure 5: Input Impedance Smith Chart
4. Study Of The Effect Of Substrate Materials…
www.ijceronline.com ||April||2013|| Page 255
Antenna gain is often related to the gain of an isotropic radiator, resulting in units dBi. Antenna gain at all the
Resonant Frequencies is observed and shown in Figure 6. Maximum Gain is of 4.5 dBi is obtained at 9.9732
GHz.
-200.00 -150.00 -100.00 -50.00 0.00 50.00 100.00 150.00 200.00
Theta [deg]
-12.50
-10.00
-7.50
-5.00
-2.50
-0.00
2.50
5.00
Gain
CPW fed UWB antennaGAIN ANSOFT
m1
m3
m4
m2
Curve Info
dB(GainTotal)
Setup4 : LastAdaptive
Freq='9.9732GHz' Phi='0deg'
dB(GainTotal)
Name X Y
m3 -90.0000 0.5...
m4 -100.0000 4.5...
Figure 6: Gain vs. Frequency
E-Plane and H-Plane Radiation Patterns at the Resonant Frequencies 4.3356GHz, 7.4765GHz, 9.9732GHz,
12.1477GHz are shown in Figures 7 and 8 respectively. The far-zone electric field lies in the E-plane and far-
zone magnetic field lies in the H-plane. The patterns in these planes are referred to as the E and H plane patterns
respectively. Figure 7 shows the radiation pattern in E-plane for Phi=0 degrees and Phi=90 degrees for all the
four resonant frequencies. Figure 8 shows the radiation pattern in H-plane for Theta=0 degrees and Theta=90
degrees for all the four resonant frequencies.
5. Study Of The Effect Of Substrate Materials…
www.ijceronline.com ||April||2013|| Page 256
Figure 7: E-Plane Radiation Patterns at Resonant Frequencies
A Quasi Omni Directional Radiation pattern is observed from the simulated patterns.
Figure 8: H-Plane Radiation Patterns at Resonant Frequencies
6. Study Of The Effect Of Substrate Materials…
www.ijceronline.com ||April||2013|| Page 257
IV. CONCLUSION
A CPW fed Circular shaped patch with compact size is proposed and simulated. It can be used for
number of wireless applications like WLAN, Wi-Fi, Wi-Max, Bluetooth etc. A comparative study is done on
antenna by varying the substrate materials which are used in popular. Finally, it is observed that wide operating
bandwidth of 9.745 GHz is obtained for FR4 substrate material. Hence, other parameters like Return Loss,
VSWR etc. are analyzed for antenna prototyped on FR4 Substrate. The operating band is below -10dB and
resonated at four frequencies. VSWR is less than 2. Peak Gain is 4.5 dBi. Quasi Omni-directional Radiation
Pattern is observed.
V. ACKNOWLEDGMENT
The authors would like to express their gratitude towards the faculty of Department of ECE, K L
University, for excellent encouragement during the tenure of work.
REFERENCES
[1] Federal Communications Commission (FCC), Washington, DC, “First report and order in the matter of revision of Part 15 of the
commission’s rules regarding ultra-wideband transmission systems,” ET-Docket 98-153, 2002.
[2] N. P. Agra wall, G. Kumar, and K. P. Ray, “Wide-band planar monopole antennas,” IEEE Trans. Antennas Propag., vol. 46, no.
2, pp. 294–295, Feb. 1998.
[3] L. Jianxin, C. C. Chiau, X. Chen, and C. G. Parini, “Study of a printed circular disc monopole antenna for UWB systems,” IEEE
Trans. Antennas Propag., vol. 53, no. 11, pp. 3500–3504, Nov. 2005.
[4] M. J. Ammann and Z.-N. Chen, “Wideband monopole antennas for multi-band wireless systems,” IEEE Antennas Propag.
Mag., vol. 45, no. 2, pp. 146–150, Apr. 2003.
[5] M. J. Ammann and Z. N. Chen, “A wide-band shorted planar monopole with bevel,” IEEE Trans . Antennas Propag., vol. 51,
no. 4, pp. 901–903, Apr. 2003.
[6] K. P. Ray and S. Tiwari, “Ultra wideband printed hexagonal monopole antennas,” Microwave., Antennas Propag., vol. 4, no. 4,
pp. 437–445,2010.
AUTHORS BIOGRAPHY
D. Ujwala, born in A.P, India in 1987. Completed B.Tech in 2008 from Koneru Lakshmaiah
College of Enginering affiliated to Acharya Nagarjuna University, Guntur. Worked as
Associate Software Engineer for KLUniversity from 2009-2010. Pursued M.Tech
(Communication and Radar) from KLU. Presently working as Assistant Professor in KLU.