IJRSP 33(5) 341-343.pdf

A corresponding conventional microstrip antenna

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a corresponding conventional microstrip antenna without embedded slots in the antenna's ground plane. Also it has been observed that all prototype antennas exhibit broad side radiation patterns. Figures 3(a) and 3(b) show E- plane and H-plane radiation patterns, respectively, for antenna 3. 4 Conclusion An attempt JS made to study the compact configuration with a group of slots on the ground plane of the antenna. From the experimental results it is found that by varying the length of the slots the patch will resonate at a much lower frequency compared to a conventional patch of the same size (a) 0.8 - 0.6 0.4 ..J w > 0.2 w ..J a:: w ~ 0 - 0 0.. (b) w > 0.8 - ~ ..J w a:: 0.6 0.4 0.2 -180 -150 -120 -90 -60 -30 0 30 60 90 120 150 180 ELEVATION ANGLE, deg Fig. 3--{a) E-plane and (b) H-plane radiation pattern for the compact antenna 3 (/; = 14.435 mm, frequency = 1.506 GHz) and also there is an enhancement in impedance bandwidth and gain. The optimal bandwidth and gain can be obtained by keeping slot length l; slightly greater than half the patch width. Also there is increased backward radiation due to embedded slots in the ground plane. All prototypes exhibit broadside radiation pattern with good cross-polarization. References 1 See T S P & Chen Z N, Micro Opt Techno/ Lett (USA), 34 (2002) 227. 2 Lu J H & Wong K L, Electron Lett (UK), 34 (1998) 1048. 3 Kuo J S & Wong K L, Microw Opt Techno/ Lett (USA), 29 (2001) 95. 4 Maci S, Gentili G B, Piazzesi P & Salvador C, IE£ Proc Microw Ant ennas propag (UK), 142 (1995) 225. 5 IE3D I 0.05, Zeland software Inc, Freemon!, USA, 2000. 6 Makal B S, Vani R M_ & Huna gund P V, Indian J Radio & Space Phys, 32 ( 2003) 382.
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  • Fall '19
  • Impedance matching, Patch antenna, radiation pattern

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