Title :
Coaxial-feed axial mode hemispherical helical antenna
Author :
Hui, H.T. ; Chen, Kenneth Y. ; Yung, E.K.N. ; Shing, X.Q.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, Hong Kong
fDate :
11/11/1999 12:00:00 AM
Abstract :
A coaxial-feed axial mode hemispherical helical antenna is studied experimentally and theoretically. Results for a 3-turn hemispherical helix indicate that circular polarisation can be obtained over a broad beamwidth. The gain bandwidth is ~33% and the peak gain is 7.6 dB. The input impedance shows that it is a standing wave antenna
Keywords :
antenna feeds; helical antennas; 7.6 dB; bandwidth; beamwidth; circular polarisation; coaxial-feed axial mode hemispherical helical antenna; gain; input impedance; standing wave antenna;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19991383
