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IEEE Transactions on Antennas and Propagation
Volume 47 Number 10, October 1999

Table of Contents for this issue

Complete paper in PDF format

Square-Ring Microstrip Antenna with a Cross Strip for Compact Circular Polarization Operation

Wen-Shyang Chen, Member, IEEE, Chun-Kun Wu, and Kin-Lu Wong, Senior Member, IEEE

Page 1566.

Abstract:

A novel design of square-ring microstrip antenna with a cross strip for achieving compact circular polarization (CP) operation is proposed and experimentally studied. The cross strip can be placed in the centerlines or diagonals of the square-ring patch. Either design can make its excited fundamental-mode patch surface current path much longer than that in a conventional square microstrip antenna with same antenna size. By incorporating a small tuning stub for splitting the fundamental mode into two near-degenerate resonant modes with equal amplitudes and 90° phase-difference compact CP operation for the proposed design can be obtained.

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