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Microstrip line fed stacked layer e  shaped patch antenna for wlan
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Microstrip line fed stacked layer e shaped patch antenna for wlan

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The design of stacked layer E-shaped microstrip patch antenna for wideband ...

The design of stacked layer E-shaped microstrip patch antenna for wideband
operation in the 5-6 GHz frequency range has been presented in this paper. The antenna is
Microstrip line feeded. The Roger RO4350 of 1.6 mm height with relative permittivity of
3.66 and dielectric loss tangent of 0.004 has been used as the substrate on which the patch is
placed. An air box of 2mm height has been introduced between substrate and the ground. The
ANSOFT HFSS software has been used for designing the antenna. High performance
characteristics and good impedance matching have been obtained. The antenna is resonating
at 5.36 GHz with a return loss of -56.5 dB. A maximum gain of 5.3 dB has been obtained in
E-plane. The proposed antenna is suitable for WLAN and WiMax applications operating
within 5.15-5.85 GHz frequency band.

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Microstrip line fed stacked layer e  shaped patch antenna for wlan Microstrip line fed stacked layer e shaped patch antenna for wlan Document Transcript

  • International Journal of Electronics and Communication Engineering & Technology (IJECET),ISSN 0976 – 6464(Print), ISSN 0976 – 6472(Online) Volume 4, Issue 3, May – June (2013), © IAEME48MICROSTRIP LINE FED STACKED LAYER E- SHAPED PATCHANTENNA FOR WLAN AND WIMAX APPLICATIONSUma Shankar Modani 1, Gajanand Jagrawal21(Govt. Engg. College, Ajmer, Rajasthan, India)2(Govt. Engg. College, Ajmer, Rajasthan, India)ABSTRACTThe design of stacked layer E-shaped microstrip patch antenna for widebandoperation in the 5-6 GHz frequency range has been presented in this paper. The antenna isMicrostrip line feeded. The Roger RO4350 of 1.6 mm height with relative permittivity of3.66 and dielectric loss tangent of 0.004 has been used as the substrate on which the patch isplaced. An air box of 2mm height has been introduced between substrate and the ground. TheANSOFT HFSS software has been used for designing the antenna. High performancecharacteristics and good impedance matching have been obtained. The antenna is resonatingat 5.36 GHz with a return loss of -56.5 dB. A maximum gain of 5.3 dB has been obtained inE-plane. The proposed antenna is suitable for WLAN and WiMax applications operatingwithin 5.15-5.85 GHz frequency band.Keywords: E- shaped, Line Feed, Stacked Layers, WLAN and WiMax.I. INTRODUCTIONDue to the inherent advantages of low profile, less weight, low cost, and ease ofintegration with microstrip circuits, the Microstrip patch antennas are widely used in wirelesscommunications [1]. However, the main disadvantage of microstrip antennas is their smallbandwidth. Many methods have been proposed to improve the bandwidth. These include theuse of a thick substrate and cutting slots in the design [2-5]. Improvement of broaderbandwidth becomes an important need for many applications such as for high speednetworks.High-speed wireless computer networks have attracted the attention of researchers,especially in the 5-6 GHz band (e. g. WiMax and IEEE 802.11a Indoor and Outdoor WLAN).These networks have the ability to provide high speed connectivity between notebookcomputers, PCs, personal organizers and other wireless digital appliances. Many novelINTERNATIONAL JOURNAL OF ELECTRONICS ANDCOMMUNICATION ENGINEERING & TECHNOLOGY (IJECET)ISSN 0976 – 6464(Print)ISSN 0976 – 6472(Online)Volume 4, Issue 3, May – June, 2013, pp. 48-55© IAEME: www.iaeme.com/ijecet.aspJournal Impact Factor (2013): 5.8896 (Calculated by GISI)www.jifactor.comIJECET© I A E M E
  • International Journal of Electronics and Communication Engineering & Technology (IJECET),ISSN 0976 – 6464(Print), ISSN 0976 – 6472(Online) Volume 4, Issue 3, May – June (2013), © IAEME49antenna designs have been proposed to suit the standards for high-speed wireless computernetworks. Some approaches have resulted in the probe-fed U-slot patch antennas [6-10], theE- shaped patch antennas [11-17] and many others.The E-shape has been an attraction for antenna designers. An E-shaped patch antennahas been presented in [11]. However, this antenna is a coaxial probe fed antenna and coversthe 5-6GHz frequency band. This antenna design is a bit complex and contains many slots inthe patch. In [12], a parametric study of this E-shaped patch antenna has been presented. In[13], an E-shaped patch antenna which operates at 1.9 GHz and 2.4 GHz frequency bands hasbeen presented. The E-shaped patch antenna presented in [14] is a coaxial probe feededantenna. In this antenna, the substrate material used is having a dielectric constant of 2.2 anda height of 3.2mm. A microstrip line fed triband E-shaped antenna has been reported in [15].This is a monopole antenna. In [16], a multilayer substrate microstrip line fed E-shapedantenna has been reported. This antenna is designed to cover 5 GHz to 6 GHz band.However, Glass and Silicon are the two substrate materials used as antenna substrate whichare different than the substrates used in proposed antenna.In this paper, a simple design of E-shaped patch antenna with an air box of 2 mminserted between ground plane and the substrate has been presented which can cover thefrequency range of 5.15-5.85 GHz. The same technique of stacked layers structure using anair box sandwiched between substrate and the ground has been reported in [11], [17-20].Ansoft HFSS which is the industry standard simulation tool for 3D full-wave electromagneticfield simulation based on Finite Element Method (FEM) has been used for simulationpurposes [21], [22].II. ANTENNA DESIGNThe side view of the proposed antenna structure has been shown in Fig. 1. The broadbanding technique of stacked layers is used to improve the bandwidth. An air box of 2 mmheight has been inserted between substrate and the ground. The Roger RO4350 of 1.6 mmthickness having relative permittivity of 3.66 and dielectric loss tangent of 0.004 has beenused as the substrate. The substrate and ground size has been considered as 47.6mm x46.6mm. The antenna is feeded by a microstrip line. The feeding method is easy to fabricatebut difficult to model accurately and have low spurious radiation and narrow bandwidth ofimpedance matching [23]. The location of the feed element with respect to the patch alsoplays a role in the antenna performance. The patch geometry has been shown in Fig. 2. Thecorresponding dimensions are listed in Table I. The E-shaped design has been obtained byremoving two rectangular patches of dimensions L1×W1 from one side of the mainrectangular patch of dimensions L×W at W3 distance apart from the two opposite sides. L2and W2 are the dimensions of the feed of the antenna.Fig.1. Side view of proposed antenna structure
  • International Journal of Electronics and Communication Engineering & Technology (IJECET),ISSN 0976 – 6464(Print), ISSN 0976 – 6472(Online) Volume 4, Issue 3, May – June (2013), © IAEME50Fig.2. E-shaped patch geometry with line feedTABLE IDIMENSIONS OF THE PATCH AND FEEDParameters Dimensions (mm)L 38W 37L1 17.5W1 15.5L2 4.8W2 11W3 2III. RESULTS AND DISCUSSIONFig. 3 shows the return loss plot of the proposed antenna. The antenna is resonating at5.43 GHz with a return loss of -58.2 dB. The lower -10 dB frequency at 4.96 GHz and upper-10 dB frequencies at 5.95 GHz have been obtained which covers the entire range of WiMaxand WLAN applications. Fig. 4 presents the E-plane and H-plane radiation patterns which arealmost omnidirectional in shape. The maximum gain of 5.5 dB has been obtained in the E-plane. The smith chart has been shown in Fig. 5 which presents the impedance characteristicsof the antenna at the entire observing frequency range of 3.5 GHz to 8 GHz. Fig. 6 presentsthe 3D polar plot obtained at 5.5 GHz. Fig. 7 shows the variations in the gain with respect tofrequency. Fig. 8 and Fig. 9 are showing the E-field and H-field respectively. It has revealedthat the gain performance of the proposed antenna is satisfactory within the desired frequencyrange. The other parameters such as peak directivity, peak gain and radiation efficiency areshown in Table II.
  • International Journal of Electronics and Communication Engineering & Technology (IJECET),ISSN 0976 – 6464(Print), ISSN 0976 – 6472(Online) Volume 4, Issue 3, May – June (2013), © IAEME51Fig.3. Return loss plotFig.4. E and H plane radiations patternsFig.5. Smith chart
  • International Journal of Electronics and Communication Engineering & Technology (IJECET),ISSN 0976 – 6464(Print), ISSN 0976 – 6472(Online) Volume 4, Issue 3, May – June (2013), © IAEME52Fig.6. Polar plotFig.7. Gain v/s frequency curveFig.8. E-field distribution on the patch
  • International Journal of Electronics and Communication Engineering & Technology (IJECET),ISSN 0976 – 6464(Print), ISSN 0976 – 6472(Online) Volume 4, Issue 3, May – June (2013), © IAEME53Fig.9. H-field distribution on the patchTABLE IIIOTHER SIMULATED RESULTSParameters Simulated ResultsPeak Directivity 3.4859Peak Gain 3.4399Radiation Efficiency 0.98682IV. CONCLUSION AND FUTURE SCOPEA simple stacked layers E-shaped microstrip patch antenna fed with microstrip linehas been designed for WiMax, WLAN and other high-speed wireless communication systemsoperating within 5.15 GHz to 5.85 GHz frequency band. The simulated results have shownsatisfactory radiation performance of the antenna across the entire operating frequency range.These features are very useful for worldwide portability of wireless communicationequipments. The proposed antenna design will be helpful for antenna design engineers todesign and optimize the antennas for other wireless applications. The future works includefabrication of the antenna, measurements of antenna performance parameters with theindustry standard equipments and comparison of simulated and measured results.REFERENCES[1] Balanis, C.A., 2005. Antenna Theory: Analysis and Design. 3rd Edn., John Wiley,Hoboken, ISBN: 047166782X, pp: 1117.[2] Yoharaaj, D. Azmir and Raja Syamsul, “A New Approach for Bandwidth EnhancementTechnique in Microstrip Antenna for Wireless Applications,” RF and MicrowaveConference, 2006. RFM 2006. International, 2006, Page(s): 205 – 209.
  • International Journal of Electronics and Communication Engineering & Technology (IJECET),ISSN 0976 – 6464(Print), ISSN 0976 – 6472(Online) Volume 4, Issue 3, May – June (2013), © IAEME54[3] Rafi, G. and L. Shafai, “Broadband microstrip patch antenna with V-slot,” IEE Proc.Microw. Antenna Propag., Vol. 151, No. 5, 435–440, October 2004.[4] Islam, M. T., M. N. Shakib, and N. Misran, "Multi-slotted microstrip patch antenna forwireless communication," Progress in Electromagnetics Research Letters, Vol. 10, 11-18, 2009.[5] Mohamed Nabil Srifi, Mourad Meloui and Mohamed Essaaidi, “Rectangular SlottedPatch Antenna for 5-6GHz Applications,” International Journal of microwave andoptical technology, vol.5 no.2 march 2010.[6] Lee, K. F., K. M. Luk, K. F. Tong, S. M. Shum, T. Huynh, and R. Q., “Experimentaland simulation studies of the coaxially fed U-slot," Proc. Inst. Elec. Eng., pt. H, Vol.144, 354-358, Oct. 1997.[7] Lee, K. F., et al., “Experimental and simulation studies of the coaxially fed U-slotsrectangular patch antenna,” IEE Proc. Microw. Antenna Propag., Vol. 144, No. 5, 354–358, October 1997.[8] H. F. AbuTarboush, H. S. Al-Raweshidy and R. Nilavalan, “Triple Band Double U-Slots Patch Antenna for WiMAX Mobile Applications”, the 14th Asia-PacificConference on Communications , Japan, October 2008.[9] H. F. AbuTarboush and H. S. Al-Raweshidy, “A Connected E-Shape and U-ShapeDual-Band Patch Antenna for Different Wireless Applications”, the SecondInternational EURASIP Workshop on RFID Technology, July, 2008.[10] Weigand, S., G. H. Huff, K. H. Pan, and J. T. Bernhard, “Analysis and design of broad-band single-layer rectangular U slot microstrip patch antennas,” IEEE Transactions onAntenna and Propagation, Vol. 51, No. 3, 457–468, March 2003.[11] Modani Uma Shankar and Jagrawal Gajanand, “A Novel Slotted E-Shaped PatchAntenna for WiMax and WLAN Applications”, IEEE International Conference onAdvanced Research in Engineering and Technology (IEEE ICARET), Publication Year:2013, Page(s): 238 – 240.[12] Modani Uma Shankar and Jagrawal Gajanand, “A Slotted E-Shaped Stacked LayersPatch Antenna for 5.15-5.85GHz Frequency Band Applications,” International Journalof Electronics and Communication Engineering & Technology (IJECET), Volume 4,Issue 3, Pp. 11-23, May- June 2013.[13] Yang, F., X.-X. Zhang, X. Ye, and Y. Rahmat-Samii, “Wide-band E-shaped patchantennas for wireless communications," IEEE Trans. Antennas and Propagat., Vol. 49,No. 7, 1091-1100, July 2001.[14] B. K. Ang and B. K. Chung, " A Wideband E-Shaped Microstrip Patch Antenna for 5–6GHz Wireless Communications," Progress in Electromagnetics Research, PIER 75,397–407, 2007.[15] Sajad Mohammad Ali Nezhad and Hamid Reza Hassani, “A Novel Triband E-ShapedPrinted Monopole Antenna for MIMO Application,” IEEE Antennas and WirelessPropagation Letters vol. 9,576-579, July 2010.[16] Ge, Y., K. P. Esselle, and T. S. Bird, “E-Shaped patch antennas for high-speed wirelessnetworks," IEEE Trans. Antennas and Propagat.,” Vol. 52, No. 12, 3213-3219,December 2004.[17] Yu, A. and X. X. Zhang, “A method to enhance the bandwidth of microstrip antennasusing a modified E-shaped patch,” Proceedings of Radio and Wireless Conference,261–264, Aug. 10–13, 2003.
  • International Journal of Electronics and Communication Engineering & Technology (IJECET),ISSN 0976 – 6464(Print), ISSN 0976 – 6472(Online) Volume 4, Issue 3, May – June (2013), © IAEME55[18] Ayoub, A. F. A., “Analysis of rectangular microstrip antennas with air substrates,”Journal of Electromagnetic Waves and Applications, Vol. 17, No. 12, 1665–1817, 2003.[19] G. Drossos, Z. Wu and L. E. Davis, "The air gap effect on a microstiip-coupledcylindrical dielectiic resonator antenna," Microw. and Opt, Techn. Lett., vol 20, pp.36-40, Jan. 1999.[20] Modani, U.S.; Modani, S.G.; “Swastika-shaped patch antennas for 5.8GHz WLANcommunications,” International Journal of Operation Research and Optimization, July-December 2011, Vol.2, No. 2, pp. 455-460, ISSN-(Print) 0975-3737, (Online) 2231-4741.[21] HFSS, Ansoft Corporation, http://www.ansoft.com/products/hfss.[22] Ansoft HFSS V11 User’s Guide, 2009. HFSS, Ansoft Corporation, Pittsburgh, USA.[23] B. Jyothi, B.T.P.Madhav, V.V.S. Murthy, P. Syam Sundar, VGKM Pisipati, "Comparative Analysis of Microstrip Coaxial Fed, Inset Fed and Edge Fed AntennaOperating at Fixed Frequency," International Journal of Scientific and ResearchPublications, Volume 2, Issue 2, February 2012 1 ISSN 2250-3153.[24] Amit Kumar Gupta, R.K. Prasad and Dr. D.K. Srivastava, “Design and Development ofDual E-Shaped Microstrip patch Antenna for Bandwidth and Gain Enhancement”,International Journal of Electronics and Communication Engineering & Technology(IJECET), Volume 3, Issue 3, 2012, pp. 34 - 42, ISSN Print: 0976- 6464, ISSN Online:0976 –6472.[25] G.A.Bidkar, P.V.Hunagund, R.M.Vani, S.N. Mulgi and P.M.Hadalgi, “Low CostSlotted Microstrip Line Fed Shorted Patch Antenna”, International Journal ofElectronics and Communication Engineering & Technology (IJECET), Volume 2,Issue 1, 2011, pp. 11 - 16, ISSN Print: 0976- 6464, ISSN Online: 0976 –6472.[26] Anurag Sharma, Ramesh Bharti and Archanaagarwal, “Enhanced Bandwidth SlottedMicrostrip Patch Antenna”, International Journal of Electronics and CommunicationEngineering & Technology (IJECET), Volume 4, Issue 2, 2013, pp. 41 - 47, ISSN Print:0976- 6464, ISSN Online: 0976 –6472.