Title :
Compact Wide-Beam Circularly-Polarized Microstrip Antenna With a Parasitic Ring for CNSS Application
Author :
Ze-Kun Pan ; Wei-Xin Lin ; Qing-Xin Chu
Author_Institution :
Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China
Abstract :
A compact single-feed circularly-polarized (CP) wide beam microstrip antenna is proposed for CNSS application. The antenna is designed with a double-layer structure, comprising a circular patch with two rectangular stubs along the diameter direction and a parasitic ring right above it. The resonance frequency and the CP characteristics are mainly controlled by the circular patch and the rectangular stubs, respectively. The vertical HPBW (half power beam width) could be widened by the parasitic ring. Experimental results show that the measured vertical HPBW is approximately 140° and the measured out-of-roundness for the horizontal radiation pattern is only 1.1 dB. Besides, it could maintain good low-profile characteristics.
Keywords :
antenna feeds; antenna radiation patterns; microstrip antennas; CNSS application; CP characteristics; circular patch; compact wide-beam circularly-polarized microstrip antenna; diameter direction; double-layer structure; half power beam width; horizontal radiation pattern; low-profile characteristics; parasitic ring; rectangular stubs; single-feed antenna; vertical HPBW; Antenna measurements; Antenna radiation patterns; Microstrip; Microstrip antennas; Substrates; Antenna gain; circular polarization; gain control; micro strip antennas; parasitic antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2014.2307348
