Open AccessDesign Method of a Circularly‐Polarized Antenna Using Fabry‐Pérot Cavity Structure
Author(s) -
Ju Jeongho,
Kim Dongho,
Lee Wangjoo,
Choi Jaeick
Publication year - 2011
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.11.0110.0267
Subject(s) - optics , patch antenna , antenna factor , turnstile antenna , antenna gain , coaxial antenna , microstrip antenna , circular polarization , ground plane , antenna measurement , physics , antenna aperture , antenna (radio) , materials science , radiation pattern , telecommunications , engineering , microstrip
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.