Title :
A CPW-fed planar log-periodic dipole antenna with suppressed cross polarization
Author :
Lin, Keng-Chih ; Lin, Yi-Cheng
Author_Institution :
Grad. Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
In this paper, a novel CPW-fed PLPDA is proposed. The antenna exhibits a fixed phase center and good cross-polarization discrimination. And the stripline structure is employed to suppress the cross-polarization level. In order to realize a fully planar structure, a conductor-backed CPW feed is co-design with the stripline with the feed port located at the edge of the PCB antenna. The optimization on the balun offset length is performed to improve the pattern stability that the maximum gain is directed to the zenith over the wide frequency range.
Keywords :
antenna feeds; antenna radiation patterns; baluns; coplanar waveguides; dipole antennas; electromagnetic wave polarisation; log periodic antennas; microstrip antennas; optimisation; planar antennas; strip lines; CPW-fed planar log periodic dipole antenna; PCB antenna; balun offset length; conductor-backed CPW feed; cross polarization suppression; fully planar structure; optimization; pattern stability; stripline structure; Coplanar waveguides; Dipole antennas; Feeds; Frequency measurement; Impedance matching; Transmission line measurements;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2010 IEEE
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4244-4967-5
DOI :
10.1109/APS.2010.5562196
