DocumentCode :
743721
Title :
Differential Fabry–Perot Resonator Antennas
Author :
Kai Lu ; Kwok Wa Leung
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
Volume :
61
Issue :
9
fYear :
2013
Firstpage :
4438
Lastpage :
4446
Abstract :
The differential Fabry-Perot resonator (FPR) antenna is investigated for the first time. It has advantages of suppressing the cross polarization and enabling integration with differential circuits. Its basic structure consists of two vertical parallel metal plates, which are connected by a horizontal ground plane. The differential FPR antenna is fed by a pair of differential L-probes protruding from the ground plane. It is found that the basic differential FPR antenna has considerable sidelobes in the E-plane. To suppress the sidelobes, a modified differential FPR antenna is proposed which has a pair of ridges at each side-opening of the parallel plates. In addition, a second modified differential FPR antenna is also proposed to reduce undesirable backward radiation. The second modified antenna has a pair of ridges placed at the top of each metal plate. It is found that all of the basic and modified antennas have low cross polarizations. The two modified differential FPR antennas were fabricated and measured, and the measurements agree reasonably well with HFSS simulations. The first and second modified antennas have calibrated measured gains of 14.2 dBi and 15.4 dBi, respectively, with measured 10-dB impedance bandwidths of ~ 2.4%.
Keywords :
Fabry-Perot resonators; antenna radiation patterns; electromagnetic wave polarisation; E-plane; HFSS simulation; backward radiation reduction; cross polarization suppression; differential Fabry-Perot resonator antennas; differential L-probes; differential circuits; horizontal ground plane; impedance bandwidth; modified differential FPR antenna; parallel plate side-opening; sidelobe suppression; vertical parallel metal plates; Backward radiation reduction; Fabry–Perot resonator antennas; cutoff structure, differential antennas; sidelobe suppression;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2013.2267196
Filename :
6527350
Link To Document :
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