Title :
Dual circularly polarized radial line slot antennas
Author :
Takahashi, Masaham ; Ando, Makoto ; Goto, Naohisa ; Numano, Yuji ; Suzuki, Masanori ; Okazaki, Yasuhiro ; Yoshimoto, Takashi
Author_Institution :
Dept. of Electr. & Commun. Eng., Musashi Inst. of Technol., Tokyo, Japan
fDate :
8/1/1995 12:00:00 AM
Abstract :
A radial line slot antenna (RLSA) is a circularly polarized high efficiency planar array. Two types of RLSAs, a single-layered and a double-layered one, have been released commercially for 12 GHz band DBS reception. The former adopts nonuniform slots excited by a radially outward traveling wave, while the latter has uniform ones excited by an inward traveling wave. The paper merges the two into a novel, dual circularly polarized RLSA. Minimum antenna gain of 33.5 dBi in a DBS bandwidth of 500 MHz is measured for a 0.55 m diameter antenna
Keywords :
antenna testing; direct broadcasting by satellite; electromagnetic wave polarisation; satellite antennas; slot antenna arrays; 12 GHz; 12 GHz band DBS reception; DBS bandwidth; RLSA; SHF; circularly polarized high efficiency planar array; double-layered antenna; dual circularly polarized radial line slot antennas; inward traveling wave; minimum antenna gain; nonuniform slots; radially outward traveling wave; single-layered antenna; Antenna arrays; Antenna measurements; Apertures; Design optimization; Gain measurement; Planar arrays; Polarization; Satellite antennas; Satellite broadcasting; Slot antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
