Title :
A Novel Unidirectional Dual-Band Circularly-Polarized Patch Antenna
Author :
Chen, Can-Hui ; Yung, E.K.N.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
Abstract :
A novel unidirectional dual-band circularly -polarized (CP) patch antenna is proposed in this communication. By loading a pair of L-shaped stubs outside the truncated patch, an outer mode and an inner mode are excited respectively. Therefore, dual-band CP operations are generated. The dual CP bandwidths are 3% and 4%. Because the meandering probe feed technique is used, the proposed antenna enjoys the wide impedance bandwidths of 8% for the lower band and 19% for the upper band. The peak gains within the dual bands are 9 dBic and 8.2 dBic and its height is 0.086λ. Besides, the front-to-back ratios are about 20 dB.
Keywords :
directive antennas; microstrip antennas; multifrequency antennas; polarisation; L-shaped stubs; dual-band CP operation; front-to-back ratio; impedance bandwidth; probe feed technique; truncated patch; unidirectional dual-band circularly-polarized patch antenna; Antenna measurements; Bandwidth; Dual band; Gain; Impedance; Patch antennas; Circular polarization; dual-band; patch antenna; unidirectional antenna;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2011.2158961
