Design Method of a Circularly‐Polarized Antenna Using Fabry‐Pérot Cavity Structure

A Fabry‐Pérot cavity (FPC) antenna producing both high‐gain and circularly‐polarized (CP) behavior is proposed. To increase antenna gain and obtain CP characteristics, a superstrate composed of square patches with a pair of truncated corners is placed above the linearly polarized patch antenna with...

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Veröffentlicht in:ETRI journal 2011, 33(2), , pp.163-168
Hauptverfasser: Ju, Jeongho, Kim, Dongho, Lee, Wangjoo, Choi, Jaeick
Format: Artikel
Sprache:eng
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Zusammenfassung:A Fabry‐Pérot cavity (FPC) antenna producing both high‐gain and circularly‐polarized (CP) behavior is proposed. To increase antenna gain and obtain CP characteristics, a superstrate composed of square patches with a pair of truncated corners is placed above the linearly polarized patch antenna with an approximately half‐wavelength distance from the ground plane at the operating frequency. The proposed antenna has the advantages of high gain, a simple design, and an excellent boresight axial ratio over the operating frequency bandwidth. Moreover, used in an FPC antenna, the proposed superstrate converts a linear polarization produced by a patch antenna into a circular polarization. In addition, the cavity antenna produces left‐hand circular‐polarization and right‐hand circular‐polarization when a patch antenna inside the cavity generates x‐direction and y‐direction polarization, respectively. The measured and simulated results verify the performance of the antenna.
ISSN:1225-6463
2233-7326
DOI:10.4218/etrij.11.0110.0267