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ISSN: 2278 – 1323                                                  International Journal of Advanced Research in Computer ...
ISSN: 2278 – 1323                                                 International Journal of Advanced Research in Computer E...
ISSN: 2278 – 1323                                                                                                         ...
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  1. 1. ISSN: 2278 – 1323 International Journal of Advanced Research in Computer Engineering & Technology Volume 1, Issue 4, June 2012 A 2.4 GHz Microstrip Patch Antenna with a Single Slot for WLAN Application Rahul Singh Rathore1, Sudeep Baudha2 , Shrikant Pandey3 Department of Electronics & Communication, Gyan Ganga College of technology, Jabalpur (M.P) 1 rahulsinghrathore12@yahoo.co.in, 2sudeepbaudha@gmail.com, 3shrikantpandey2009@gmail.comABSTRACT- A newly design technique many techniques have been suggested e.g., forfor enhancing Bandwidth that improves single slot, microstrip patch antennas onthe performance of a conventional electrically thick substrate, slotted patchmicrostrip patch antenna is proposed. antenna have been proposed and investigated.This paper presents a novel wideband In general, the impedance bandwidth of a patchslot antenna. The design adopts antenna is proportional to the antenna volume,contemporary techniques; A single slot measured in wavelengths. However, by usingpatch antenna structure. The effect of single slot patch with the walls at the substrate,these techniques and by introducing the one can obtain enhanced impedance bandnovel single shaped patch, offer a low width. A simple patch antenna with basicprofile, broadband, high gain, and rectangular patch operates in a single frequencycompact antenna element. The result band. A patch antenna intended to operate at ashowed satisfactory performance with center resonance frequency fr mounted on amaximum achievable return loss - substrate having dielectric constant εr would37.5db and a fractional impedance have length L and width W of the patch asbandwidth of 2.3GHZ-2.6GHZ. The found from the following equations neglectingdesign is suitable for mobile the fringing effect. ccommunication, satellite Leff communication & WPAN. 2 f 0  reff 1   o   r  1 2 W I. INTRODUCTION 2  2   Microstrip patch antennas have several well-known advantages, such as low profile, low andcost, light weight, ease of fabrication and  r  1  r 1 1  eff  1conformity. However, the microstrip antenna 2 2  h 2inherently has a low gain and a narrow 1  12   wbandwidth. To overcome its inherent limitationof narrow impedance bandwidth and low gain, 139 All Rights Reserved © 2012 IJARCET
  2. 2. ISSN: 2278 – 1323 International Journal of Advanced Research in Computer Engineering & Technology Volume 1, Issue 4, June 2012 II. ANTENNA GEOMETRY a slot antenna. Gain of the antenna AND DESIGN reaches 5dB with an operating frequencyA low-profile microstrip slot patch antenna is 2.4 GHZ.proposed as shown in Fig. 1. Rectangular The overall impedance bandwidth (retum lossgeometries were simulated to optimize the reaches -37.5 dB). The measurement resultsperformance, starting with a rectangular patch agree well with the predicted ones. The centralantenna on a rectangular ground plane and frequency over the frequency range of interestending up with an slot shape, for both the is 2.4 GHz. The overall antenna thickness isradiator and the ground plane. The about 62mil. results of the return loss and inputconventional shape of slot patch antenna shown impedance behaviour of the proposed single-in Fig. 1 has a substrate 124.4mm*93.3mm. patch slot antenna frequencies is obtained.Slot length of 62.2 mm, width 3.11mm and fr is Fig. 2 shows the simulated and measured return2.4GHZ. loss with a single band whose measured bandwidth is 2.3GHZ – 2.6GHZ at -10dB. XY Plot 2 Slot_Antenna_ADKv1 ANSOFT 0.00 Curve Info dB(S(p1,p1)) Setup1 : Sw eep1 -5.00 -10.00 -15.00 dB(S(p1,p1)) -20.00 -25.00 -30.00 -35.00 1.00 1.50 2.00 2.50 3.00 3.50 4.00 Freq [GHz] Fig.2: Measured return loss ff_2D_GainTotal Slot_Antenna_ADKv1 ANSOFT 10.00 Curve Info dB(GainTotal) Setup1 : LastAdaptive Fig.1: Slot Antenna (Top view) 5.00 Phi=0deg dB(GainTotal)_1 Setup1 : LastAdaptive Phi=90deg III. SIMULATION AND -0.00 EXPERIMENTAL RESULTS -5.00The antenna performance was investigated Y1numerically and experimentally. The -10.00simulation was done using the -15.00commercial simulator HFSS ver. 13, When theparameters of the proposed antenna are selected -20.00as indicated in Figs. 1. Fig. 3 shows the gain of -25.00 -200.00 -150.00 -100.00 -50.00 0.00 50.00 100.00 150.00 200.00 Theta [deg] Fig.3:Gain of the Antenna 140 All Rights Reserved © 2012 IJARCET
  3. 3. ISSN: 2278 – 1323 International Journal of Advanced Research in Computer Engineering & Technology Volume 1, Issue 4, June 2012 Smith Chart 1 Slot_Antenna_ADKv1 ANSOFT 90 Curve Info 100 80 110 1.00 70 S(p1,p1) 120 60 Setup1 : Sw eep1 130 50 0.50 2.00 140 40 150 30 160 0.20 5.00 20 achieve a wide impedance bandwidth (return170 10 loss < - 10dB) over the frequency range from180 0.00 0.00 0.20 0.50 1.00 2.00 5.00 0 2.3 GHz to 2.6 GHz.Cause of the good-170 -10 bandwidth and its range it is very suitable for -160 -0.20 -5.00 -20 the WPAN and satellite communication -150 -30 applications. The measured and simulated -140 -40 results are in good agreement -0.50 -2.00 -130 -50 -120 -60 -110 -1.00 -70 -100 -90 -80 V. REFERENCES Fig.4 :Smith Chart Radiation pattern [1] Linxi Zhang, Qi Zhang,, “The Influence of Dielectric Constant on Bandwidth of U-notch Microstrip Patch Antenna”, International Conference on Ultra-Wideband IEEE, 2010.Fig.4 show the smith chart of a slot antenna [2] Aditi sharma G. Singh, “ Rectangular micro strip patch antenna design at THz frequency for short distance wireless(radiation pattern), which shows the direction communication systems” , infrared milli TeraHz Waves, 2009.of the radiation from the antenna.which is [3] D. N. Elsheakh, Student Member, IEEE, H. A. Elsadek, E.above 80% in the positive side in the chart that A. Abdallah, H. Elhenawy, and M. F. Iskander, Member, IEEE, “Enhancement of Microstrip Monopole Antennais to good result of the antenna. Bandwidth by Using EBG Structures”, IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 8, 2009. [4] M.A. Matin, B.S. Sharif. C.C. Teesimenidis, “Broadband IV.CONCLUSION stacked Microstrip Antennas with Different Radiating patch”, Springer LLC, 2009.In this paper a novel slot antenna with single- [5] Wang jain Zhang Hou Huang Wenli Huang Xueyu, “ASub structure, single slot and single frequency novel wide band circular patch antenna”, Journal of electronics (CHINA), Vol.22No.6, Nov ’2005 .operation has been presented. A wide-band [6] Vinode kumar Singh and Ashok mittal, “Design of wide band micro strip antenna arry at millimeter wavemultiple slotted stacked patch antenna has been frequencies”, International journal of infrared anddesigned for high gain. A novel technique for millimeter waves, vol.21.No.2, Oct’1999. [7] Ting-Hua Liu & Wen-Xun Zhang, “Compound techniquesenhancing bandwidth and gain of microstrip for broadening the bandwidth of microstrip patch antenna”, Asia Pacific Microwave Conference 1997.patch antenna is successfully designed in thispaper. The proposed microstrip patch antennaachieves a fractional bandwidth of (2.3 to 2.6GHz) at 10 dB return loss . The maximumachievable gain of the antenna is 5 dBi. Bycarefully displacing one feed from theprincipal axes of the single patch delicately, itis possible to realise resonant modes and 141 All Rights Reserved © 2012 IJARCET

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