A New High Gain Circularly Polarized Microstrip Antenna with Diagonal Short

Hiroyuki OHMINE  Hitoshi MIZUTAMARI  Yonehiko SUNAHARA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E80-B   No.7   pp.1090-1097
Publication Date: 1997/07/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Antennas and Propagation
Keyword: 
antennas and propagation,  proximity coupling,  microstrip antenna,  circular polarization,  axial ratio,  gain,  boundary element method,  

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Summary: 
A new configuration of high gain circularly polarized microstrip antenna with a diagonal short and its analysis using boundary element method with a radiation load are presented. The center of a radiating patch is shorted with a 45-degree diagonal offset for not only obtaining a high gain but exciting a circular polarization. This configuration leads to achieving high gain with keeping a very low profile configuration. Boundary element method with radiation load which takes into account the effect of radiation loss is employed to analyze this complicated configuration. The radiation load, which is very important when boundary element method is applied to antenna analyses, can be obtained from radiation admittance using recurring technique, so that the accuracy of the antenna characteristic calculations can be improved. This antenna was designed and tested in the L-band and good characteristics, axial ratios and radiation patterns, have been verified.