Title :
Design of corrugated ground loaded with medium for directivity enhancement of circular polarized patch antenna
Author :
Huang, Cheng ; Zhao, Zeyu ; Feng, Qin ; Zhang, Hui ; Luo, Xiangang
Author_Institution :
State Key Lab. of Opt. Technol. for Microfabrication, Chinese Acad. of Sci., Chengdu, China
Abstract :
In this paper, a novel corrugated ground loaded with medium is proposed for enhancing the directivity of circular polarized patch antenna. Different from the suppression of surface wave propagation in the choke grooves, the proposed corrugated structure can modulate surface wave distribution and reradiate parts of surface energy into free space, resulting in the beaming effect. The radiation performance of this circular polarized patch antenna with grooves and medium loaded in the ground is investigated by using finite difference time domain method. The simulation results show that the designed antenna resonates around 10.35 GHz, where the axial ratio is less than 3 dB. Furthermore, the antenna gain reaches 13.2 dBic, which is improved by about 7 dB in comparison with circular polarized patch antenna on the flat ground. The physical mechanism for antenna performance improvement is described as well.
Keywords :
antenna radiation patterns; microstrip antennas; polarisation; surface electromagnetic waves; beaming effect; choke grooves; circular polarized patch antenna; corrugated ground design; directivity enhancement; frequency 10.35 GHz; gain -3 dB; gain 13.2 dB; surface energy; surface wave distribution; surface wave propagation; Antennas and propagation; Apertures; Corrugated surfaces; Inductors; Optical modulation; Optical polarization; Optical surface waves; Patch antennas; Resonance; Surface waves; circular polarized patch antenna; corrugated ground; directivity; radiation performance; surface wave;
Conference_Titel :
Microwave Conference, 2009. APMC 2009. Asia Pacific
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-2801-4
Electronic_ISBN :
978-1-4244-2802-1
DOI :
10.1109/APMC.2009.5384243
