Title :
Square-ring microstrip antenna with a cross strip for compact circular polarization operation
Author :
Chen, Wen-Shyang ; Wu, Chun-Kun ; Wong, Kin-Lu
Author_Institution :
Dept. of Electron. Eng., Cheng-Shiu Inst. of Technol., Kaohsiung, Taiwan
fDate :
10/1/1999 12:00:00 AM
Abstract :
A novel design of square-ring microstrip antenna with a cross strip for achieving compact circular polarization (CP) operation is proposed and experimentally studied. The cross strip can be placed in the centerlines or diagonals of the square-ring patch. Either design can make its excited fundamental mode patch surface current path much longer than that in a conventional square microstrip antenna with same antenna size. By incorporating a small tuning stub for splitting the fundamental mode into two near-degenerate resonant modes with equal amplitudes and 90° phase-difference compact CP operation for the proposed design can he obtained
Keywords :
electromagnetic wave polarisation; microstrip antennas; mobile antennas; resonance; tuning; 90° phase-difference; antenna radiation pattern; antenna size; centerline cross strip; compact circular polarization operation; diagonal cross strip; fundamental mode patch surface current path; near-degenerate resonant modes; portable communication equipment; resonant mode amplitude; square-ring microstrip antenna; tuning stub; Antenna feeds; Antenna measurements; Arm; Communication equipment; Frequency; Microstrip antennas; Permittivity; Polarization; Receiving antennas; Resonance;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
