Title :
Fan beam formation using spiral array antennas
Author :
Nakano, H. ; Shinma, Y. ; Mimaki, H. ; Yamauchi, J. ; Hirose, K.
Author_Institution :
Coll. of Eng., Hosei Univ., Koganei, Japan
Abstract :
Two types of spiral array antennas that form circularly polarized fan beams are numerically analyzed. One is composed of two-arm elliptical spiral elements, and the other is composed of single-arm round spiral elements. It is found that the elliptical spiral array antenna can radiate a wider fan beam than a conventional round spiral array antenna. It is also found that the single-arm spiral array antenna can radiate a fan beam off-normal to the antenna plane.
Keywords :
antenna arrays; antenna radiation patterns; electromagnetic wave polarisation; spiral antennas; circularly polarized fan beams; elliptical spiral array antenna; fan beam formation; round spiral array antenna; single-arm round spiral elements; single-arm spiral array antenna; two-arm elliptical spiral elements; Antenna arrays; Antenna radiation patterns; Arm; Coplanar waveguides; Current distribution; Educational institutions; Frequency; Polarization; Shape; Spirals;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1996. AP-S. Digest
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-3216-4
DOI :
10.1109/APS.1996.549912
