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Journal Article Design Method of a Circularly-Polarized Antenna Using Fabry-Perot Cavity Structure
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Authors
Jeongho Ju, Dongho Kim, Wangjoo Lee, Jaeick Choi
Issue Date
2011-04
Citation
ETRI Journal, v.33, no.2, pp.163-168
ISSN
1225-6463
Publisher
한국전자통신연구원 (ETRI)
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.4218/etrij.11.0110.0267
Project Code
10ZI1100, Research on Ubiquitous Infra, Kim Dae Sik
Abstract
A Fabry-P챕rot 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. © 2011 ETRI.
KSP Keywords
Antenna gain, Axial Ratio, Cavity structure, Circularly polarized, Design method, FPC antenna, Fabry-Perot cavity, Half-wavelength, Linear polarization, Linearly polarized, Operating frequency