Title :
Spiral antenna with coplanar strip line feed
Author :
Nakano, Hisamatsu ; Yamauchi, Junji ; Hirose, Keikichi
Author_Institution :
Hosei Univ., Tokyo, Japan
Abstract :
A low-profile spiral antenna composed of a small number of turns is developed as a radiation element for circular polarisation. The spiral is fed without a balun circuit from a coplanar strip line located in the middle of two conducting planes. The upper plane has a circular aperture for the spiral to radiate. The spiral arm is optimised for 11.85 GHz. An array antenna consisting of four spirals is fabricated and the radiation characteristics are presented.
Keywords :
antenna feeders; antenna radiation patterns; microwave antenna arrays; strip lines; 11.85 GHz; array antenna; circular aperture; circular polarisation; coplanar strip line feed; low-profile spiral antenna; radiation characteristics; radiation element; spiral arm;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19921367
