Dual-Frequency Circularly-Polarized Patch Antenna with Compact Size and Small Frequency Ratio

TitleDual-Frequency Circularly-Polarized Patch Antenna with Compact Size and Small Frequency Ratio
Publication TypeJournal Article
Year of Publication2007
AuthorsBao, XL, Ammann, MJ
Journal TitleIEEE Transactions on Antennas & Propagation
Volume55
Issue7
Pagination2104-2107
Journal Date07/2007
ISSN Number0018-926X
Abstract

A novel probe-fed single-layer annular-ring patch antenna for dual-frequency circular polarization is evaluated numerically and experimentally verified. The proposed antenna consists of a small circular patch surrounded by two concentric annular-rings, which is loaded by an unequal lateral cross-slot ground plane. The circularly-polarized frequency ratio of the two resonant modes is tunable to a small value, suitable for wireless communications systems. The patch size of the proposed antenna is reduced by about 53% compared to the conventional circular patch at a given frequency. The radiation characteristics of the novel antenna are also presented.

URLhttp://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=4267894
DOI10.1109/TAP.2007.900271
Funder

Science Foundation Ireland

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