Title :
A Comb-Line Antenna Modified for Wideband Circular Polarization
Author :
Hirose, Kazuhide ; Shinozaki, Keita ; Nakano, Hisamatsu
Author_Institution :
Coll. of Eng., Shibaura Inst. of Technol., Tokyo, Japan
Abstract :
A sequential rotation technique is newly applied to a circularly polarized (CP) comb-line antenna. The antenna is analyzed using the moment method. First, a novel loop antenna is proposed as a CP radiation element. Next, the loop element is used for a comb-line antenna to radiate a CP wave. This reference antenna shows a bandwidth of 3% for a 3-dB axial-ratio criterion. Last, the comb-line antenna is modified for wideband CP radiation. It is both numerically and experimentally revealed that the CP wave bandwidth is wider than that of the reference antenna by a factor of five.
Keywords :
antenna radiation patterns; broadband antennas; electromagnetic wave polarisation; loop antennas; method of moments; axial-ratio criterion; comb-line antenna; gain 3 dB; loop antenna; moment method; numerical analysis; sequential rotation technique; wideband CP radiation wave element; wideband circular polarization; Antenna feeds; Antenna radiation patterns; Bandwidth; Directive antennas; Gain; Method of moments; Circular polarization; comb-line antenna; loop antenna;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2015.2394811
