E shape microstrip patch antenna design for wimax applications, international journal of science , engineering & technology research (ijsetr), volume 2 , issue 3 march 2013
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E shape microstrip patch antenna design for wimax applications, international journal of science , engineering & technology research (ijsetr), volume 2 , issue 3 march 2013

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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 ...

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.

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E shape microstrip patch antenna design for wimax applications, international journal of science , engineering & technology research (ijsetr), volume 2 , issue 3 march 2013 Document Transcript

  • 1. ISSN: 2278 – 7798 International Journal of Science, Engineering and Technology Research (IJSETR) Volume 2, Issue 3, March 2013E-SHAPE MICROSTRIP PATCH ANTENNADESIGN FOR WIRELESS APPLICATIONS Sohag Kumar Saha1, Amirul Islam Rony2, Ummay Habiba Suma3, Md. Masudur Rahman4ABSTRACTThis paper presents the design & I. INTRODUCTIONsimulation of E-shape microstrip patchantenna exhibiting wideband operating Microstrip patch antenna is a key buildingfrequencies for various wireless in wireless communication and Globalapplications. This antenna will provide the Positioning system since it was firstwide bandwidth which is required in demonstrates in 1886 by Heinrich Hertzvarious applications like remote sensing, and its practical application bybiomedical application, mobile radio GulielmoMarconi in 1901 [1].Future trendsatellite, wireless communication etc. The in communication design is towardscoaxial feed or probe feed technique is compact devices. A microstrip antennaused in the experiment. The performance consists of a dielectric substrate, with aof the designed antenna was analyzed in ground plane on the other side. Due to itsterms of bandwidth, gain, return loss, advantage such as low profile planerVSWR, and radiation pattern. The design configuration, low weight, low fabricationis optimized to meet the best possible cost and capability to integrated withresult. The proposed antenna is designed microwave integrated circuit technology,by air substrate which has a dielectric the microstrip patch antenna is very wellconstant of 1.0006. The results show the suited for applications such as wirelesswideband antenna is able to operate from communication system, cellular phone,8.80 to 13.49 GHz frequency band with radar system and satellite communicationoptimum frequency at 8.73 GHz. system [1][2]. They have the capability to operate in dual and triple frequencyKEYWORDS: E-shaped patch antenna, operations. However, narrow bandwidthAir substrate, HFSS software, Wireless came as the major disadvantage for thiscommunication. type of antenna [1]. There are several techniques have been[1] Sohag Kumar Saha, Final year student, Studying B.Sc atElectrical and Electronic Engineering (EEE) in Pabna Science applied to overcome this problem, such asand Technology University, Pabna-6600, Bangladesh.Mobile: increasing the substrate thickness,+88-01723 323095. E-mail: engr.sohag.eee@gmail.com[2] Md. Amirul Islam, Final year student, Studying B.Sc at introducing parasitic element, that is co-Electrical and Electronic Engineering (EEE) in Pabna Science planer and stack configuration, orand Technology University, Pabna-6600, Bangladesh. Mobile:+88-01722 302779. E-mail: ronyamirul@yahoo.com. modifying the patch’s shape includes[3]Ummay Habiba Suma, Final Year B.Sc. Engineering designing an E-shaped patch antenna or, astudent, Department of Electrical & Electronic Engineering,Pabna Science & Technology University, Pabna, Bangladesh U-slot patch antenna. After the study of(E-mail: sumaeee39@gmail.com). several literature , We find that, U-slot[4] Supervisor: Md. Masudur Rahman, Lecturer, Department ofElectrical and Electronic Engineering (EEE), Pabna Science and microstrip antenna provides bandwidth upTechnology University, Pabna-6600, Bangladesh. Mobile: +88- to 30% while E-shaped patch antenna can01716 495004. E-mail: masoomeeepstu@gmail.com increase bandwidth above 30% compared All Rights Reserved © 2013 IJSETR
  • 2. ISSN: 2278 – 7798 International Journal of Science, Engineering and Technology Research (IJSETR) Volume 2, Issue 3, March 2013both designs [2]. The E-shaped in much antenna working frequency, W is the patchsimpler to construct by only adjusting width, the effective dielectric constant andlength, width, and position of slots. The the length are given as,main objective of designing an E-shapedmicrostrip patch antenna is to optimize thebase design in to obtain higher bandwidth.The configuration of E-shaped microstripantenna [13] is shown if Figure-1 &Equivalent circuit of rectangular patch E-shaped patch antenna [13] is shown inFigure-2 simultaneously. By using above equations we can find the value of actual length of the patch as,II. DESIGN OF RECTANGULARPATCHThe rectangular microstrip patch antennahas been designed by calculating thelength and width from the given equation[13]: Figure-3: 3D view of proposed E-shapedWhere, C is the velocity of light, is the antenna & Design Geometry of E-shapeddielectric constant of substrate, f is the microstrip patch antenna All Rights Reserved © 2013 IJSETR
  • 3. ISSN: 2278 – 7798 International Journal of Science, Engineering and Technology Research (IJSETR) Volume 2, Issue 3, March 2013BLOCK DIAGRAM OF DESIGNINGPROCEDURE: Figure-4: Block Diagram of Designing procedure antenna All Rights Reserved © 2013 IJSETR
  • 4. ISSN: 2278 – 7798 International Journal of Science, Engineering and Technology Research (IJSETR) Volume 2, Issue 3, March 2013III. DESIGN METHODOLOGY the probe feeding are introduced for attaining a required bandwidth, resonantRecently there have been numerous methods frequency and gain value [11][12]. Theof enhancing the bandwidth of an antenna proposed design methodology of the givenfor example modifying the probe feed, using antenna is given in Fig-4.multiple resonances, using folded patch feedor, using the slotted radiating element [5][6].We know, as thickness increases the V. ANTENNA DESIGN & STRUCTURE:bandwidth increases accordingly. The inputimpedance of about 42% is achieved In this paper several parameter have been[1][3][4]. The slots making it too look alike investigate using HFSS. The designinverted E -shape, it demonstrated a specifications of the patch antenna are:bandwidth enhancement by 30%. In this Default microstrip antenna specifications:design an air-filled or foam has been  The dielectric substrate materialessential to realize broadband selected for design which hascharacteristics. The design uses substrate dielectric constant of 1.0006material with relative permittivity is  Main patch:(1.0006), that is air & the patch shape is thecombination of inverted E & inverted U. Length =10.0 mm Width =15.7 mmIV. SIMULATION SETUP  Outer patch: Length=13.2mmThe antenna’s resonant properties werepredicted and optimized using High Width=21.7mmFrequency Structure simulator Software  Slot:(HFSS). The design procedure begins with Main width=17.7mmdetermining the length, width, and the type Slot width= 1.0mmof dielectric substance for the given Slot A width=8.4mmoperating frequency as shown in the flow Slot B width=10.9mmdiagram of Fig-4. Then using themeasurements obtained above simulation  Centre arm:has been setup for the basic rectangular Width=5.3mmmicrostrip antenna and the parameters are  Feed point:optimized for the best impedance matching Width=2.6mm[7][8]. Furthermore, two parallel slots are Length=1.8mmincorporated and optimized, such that it  Substrate used: Airclosely resembles E-shape. This increasesthe gain of the antenna. After that, two more Thickness=3.2mmparallel slots and one perpendicular slots are Dielectric constant=1.0006incorporated and optimized such that, it  Substrate and ground:closely resembles U shape [9]. Then Width and length = 60mmdielectric material of 1.0006 introduces to  Core diameter=1.275mmdecrease the size of the antenna and to  Teflon diameter=4.17mmfurther enhance the bandwidth [10]. At last  Teflon Dielectric constant=2.08 All Rights Reserved © 2013 IJSETR
  • 5. ISSN: 2278 – 7798 International Journal of Science, Engineering and Technology Research (IJSETR) Volume 2, Issue 3, March 2013VI. PARAMETRIC STUDYThe default value for this antenna ispresented in previous article. Dimensionsthat are kept constant in these papers aremain patch, outer patch, substrate’sthickness, Slot B length, Core diameter,Teflon diameter, Teflon Dielectric constant.Other parameters are set as variables. Onlyone parameter is allowed to change at a timewhile other variables remain constant as C. Changes in Centre Arm Widthdefault except ground and substrate that willvaried together. All dimensions mentioned Fig-7 shows the S11 parameter whenare in millimeters. center arm width varied from 4.2mm to 6.2 mm by 0.5 increment. As the width A. Changing Air Gap with C-Foam PF- increases, the 1st and 2nd resonant 2 frequency shifted to lower frequency and the magnitude of S11 decreases. The The microstrip antenna is simulated with opposite occur at the 2rd resonant C-Foam PF-2 substrate that has a frequency. dielectric constant of 1,03 and compared the output with the microstrip antenna which is simulated with air that has a dielectric constant of 1.0006. The result is shown in Fig-5. D. Changes in slot length Fig-8 shows S11 magnitude when slot A length varied from 7.6mm to 9.6mm with 0.4mm decrement. As the length B. Changes the substrate size increases, the 1st and 2nd resonant frequency shifted to lower frequency and Figure-6 shows the S11 parameter when the magnitude of S11 decreases, during dimension of substrate is changing. The 9.2mm to 9.6mm , where the magnitude result doesn’t not show much difference at 1st resonant frequency increase. The in terms of bandwidth but slightly affect opposite occur at the 3rd resonant the magnitude of S11. frequency. All Rights Reserved © 2013 IJSETR
  • 6. ISSN: 2278 – 7798 International Journal of Science, Engineering and Technology Research (IJSETR) Volume 2, Issue 3, March 2013E. Changes in Main Slot Width:The main slot length is varied from VII. RESULTS15.7mm from 19.7mm with increment of1mm. This shows, the low cut off Antenna is optimizes based on the resultfrequency is virtually the same for all of section of Parametric study. The aimvalues. The upper cut off frequency is to optimization is to obtain better gaindecreases as main slot width increases. and bandwidth that in Figure-5. TheThe bandwidth of other parameter varied parameter specifications afterremain constant. optimization are shown in Table-1:F. Changes in Slot Width (Sa, Sb):Slot width is varied from 0.5mm to2mm, with increment of 0.5mm. For Sa,almost similar patter can be seen in Fig-10. In Fig-11, when Sb varied all valuesshow a similar pattern. Magnitude forS11 at 1st & 3rd resonant frequencydecreases, as Sb increase. All Rights Reserved © 2013 IJSETR
  • 7. ISSN: 2278 – 7798 International Journal of Science, Engineering and Technology Research (IJSETR) Volume 2, Issue 3, March 2013 A. Optimized Parameters bandwidth, expanded from 4.68 GHz to 5.4 GHz. Table-1: Optimized parameters: Parameters Label Dimen- REFERENCES sion Main WsB 15.7 [1] Pauria, Indu Bala, Sachin Kumar, and Slot Slot Sandhya Sharma. "Design and Simulation of E- width Shape Microstrip Patch Antenna for Wideband Applications." International Journal of Soft Slot A Sa 2 Computing 2. width Slot B Sb 0.6 [2] Islam, Md Amirul, Sohag Kumar Saha, and width Md Masudur Rahman. "Dual U-Shape Slot A LsA 8.8 Microstrip Patch Antenna Design for WiMAX length Applications." International Journal of Science, Engineering and Technology Research 2.2 Centre (2013): pp-231. Arm Width WC 4.7 [3] Bhardwaj, Dheeraj, et al. "Design of square patch antenna with a notch on FR4 substrate." Ground Width Wg 60 Microwaves, Antennas & Propagation, IET 2.8 Length Lg 60 (2008): 880-885. B. Radiation Pattern of Optimized [4] Hsu, Heng‐Tung, Fang‐Yao Kuo, and Ping‐Hung Lu. "Design of WiFi/WiMAX Antenna dual‐band E‐shaped patch antennas through cavity model approach." Microwave and OpticalFig 14(a) and 14 (b) shows the radiation Technology Letters 52.2 (2010): 471-474.pattern for the antenna at 8.73 GHz. Themagnitude of the radiation pattern from the [5] Zaker, Reza, Changiz Ghobadi, and Javadpeak of the main beam decreases by 50% or Nourinia. "Bandwidth enhancement of novel-3dB. compact single and dual band-notched printed monopole antenna with a pair of L-shapedVIII. CONCLUSION slots." Antennas and Propagation, IEEE Transactions on 57.12 (2009): 3978-3983.An E-shaped wideband microstrip patch [6] AbuTarboush, H. F., H. S. Al-Raweshidy,antenna has been designed by using Air and R. Nilavalan. "Triple band double U-slotssubstrate, & simulated the proposed antenna patch antenna for WiMAX mobile applications."by HFSS (High Frequency Structure Communications, 2008. APCC 2008. 14th Asia-Simulator-Version 11) software. A Pacific Conference on. IEEE, 2008.parametric study is presented with theresults showing that the antenna can be [6] Ramesh Gar g, Prakash Bartia, Inderoperated at 8.80 GHz up to 13.49 GHz Bahl, Apisak Ittipiboon, „ Microstripfrequency band. This result is an Antenna Design Handbook’’, 2001, - pp 1 68,improvement, when compared to the 253 316 Artech House Inc. Norwood, MA.original specification which gives wide All Rights Reserved © 2013 IJSETR
  • 8. ISSN: 2278 – 7798 International Journal of Science, Engineering and Technology Research (IJSETR) Volume 2, Issue 3, March 2013[7] David M. Pozar. Considerations for Wireless communication, Power systemmillimeter wave printed antennas. stability & Renewable energy etc. Mobile:IEEETransactions on Antennas and Propagation, +88-01723323095.31(5):740{747, 1983. E-mail: engr.sohag.eee@gmail.com [2] Md. Amirul Islam, Final year[8] “ Design of linear ly polarized rectangular Student, Studying B.Sc at Electrical andmaicrostrip patch antenna using IE3D/PSO” C. Electronic Engineering (EEE) in PabnaVISHNU VARDHANA REDDY and RAHUL Science and Technology University,RANA 2009 Pabna-6600, Bangladesh. The author has one International Journal Publication in[9] W. F. Richards, Y. T. Lo, and D. D. the field of Microstrip patch antennaHarrison, “An improved theory of Microstrip design. He is an author of a book aboutantennas with applications,” IEEE Trans . Fuzzy Logic controller in power systemAntennas and Propagation, vol. AP-29, pp,38- published in Lambert Academic Publishing (LAP). His research interest46, Jan. 1981. includes: Microstrip patch antenna, Wireless communication, Power system[10] C. A. Balanis, “Antenna Theory, stability. Mobile: +88-01722302779. E-Analysis and Design,” John Wiley & Sons, mail: ronyamirul@yahoo.com.NewYork, 1997. [3] Ummay Habiba Suma, Final Year[11] H. Pues and A Van de Capelle, “Accurate Student, Studying B.Sc. at Electrical &transmission-line model for the rectangular Electronic Engineering (EEE) in Pabnamicrostrip antenna,” Proc. IEE, vol. 131, pt. H, Science & Technology University,no. 6, pp. 334-340, Dec. 1984. Pabna-6600, Bangladesh. His research interest includes: Microstrip patch antenna, Wireless communication, Power[12] Foundations of Interconnect and Microstrip system stability & Renewable energy,Design/ T. C. Edwards and M. B. Steer,john Solar & Biogas Based Power stationWiley & sons NY 2000, ISBN 0-471-60701-0. design. E-mail: (sumaeee39@gmail.com )[13] Ang, Boon-Khai, and Boon-Kuan [4] Supervisor: Md. MasudurChung. "A wideband E-shaped microstrip Rahman, Lecturer, Department of Electrical and Electronic Engineeringpatch antenna for 5-6 GHz wireless (EEE), Pabna Science and Technologycommunications." Progress In University, Pabna-6600, Bangladesh. HeElectromagnetics Research 75 (2007): 397- received his B.Sc. Engineering degree407. from Khulna University of Engineering & Technology (KUET), Khulna, Bangladesh. He has five InternationalAUTHORS BIOGRAPHY Journal Publications & also has International conference paper in IEEE. [1] Sohag Kumar Saha, Final year His research Interest includes: Antenna Student ,Studying B.Sc at Electrical Design, Microstrip Patch antenna, and Electronic Engineering (EEE) in Wireless communications, Biomedical Pabna Science and Technology technology etc. Mobile:+8801716495004. University, Pabna-6600, Bangladesh. The E-mail: masoomeeepstu@gmail.com author has one International Journal publication and also working in the field of Microstrip patch antenna design & their application in wireless communication. His research interest includes: Microstrip patch antenna, All Rights Reserved © 2013 IJSETR