Title :
Two-arm microstrip spiral antenna for multi-beam pattern control
Author :
Kim, M. ; Choo, H. ; Park, I.
Author_Institution :
Dept. of Electr. & Comput. Eng., Ajou Univ., Suwon, South Korea
fDate :
5/26/2005 12:00:00 AM
Abstract :
A two-arm microstrip spiral antenna with a circular aperture on the ground plane for multi-beam pattern control is presented. Several beam shapes can be selected by controlling the phase difference of the two spiral arms with the pin diode phase shifters located on each feedline. At the operating frequency band, the antenna has four different radiation patterns: the normal beam, the conical beam, and the two tilted beams. The multi-beam pattern control is confirmed with measurements.
Keywords :
antenna radiation patterns; microstrip antennas; p-i-n diodes; phase shifters; spiral antennas; beam shapes; circular aperture; conical beam; multibeam pattern control; normal beam; operating frequency band; phase difference; pin diode phase shifters; radiation patterns; spiral antenna; spiral arms; tilted beams; two-arm microstrip antenna;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20051110
