Title :
Single-arm spiral slot antenna fed by a triplate transmission line
Author :
Nakano, Hisamatsu ; Nakayama, Keisuke ; Mimaki, H. ; Yamauchi, Junji ; Hirose, Keikichi
Author_Institution :
Coll. of Eng., Hosei Univ., Tokyo, Japan
Abstract :
A spiral slot antenna consisting of a single arm is etched into the upper plate of a triplate transmission line. Power on a feed strip line located between the upper and lower plates of the triplate is electromagnetically coupled to the spiral slot. The configuration of the spiral slot is optimised for radiation of a circularly polarised wave. An array antenna consisting of spiral slots, to which a pair-element technique is applied, shows wideband characteristics for the return loss and axial ratio.
Keywords :
antenna feeders; electromagnetic wave polarisation; frequency response; microstrip antennas; microwave antenna arrays; slot antennas; array antenna; axial ratio; circularly polarised wave; electromagnetically coupled; feed strip line; pair-element technique; return loss; single arm; spiral slot antenna; triplate transmission line; wideband characteristics;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19921339
