Title :
A reflection cancelling slot set in a linearly polarized radial line slot antenna
Author :
Takada, Jun-ichi ; Ando, Makoto ; Goto, Naohisa
Author_Institution :
Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol., Japan
fDate :
4/1/1992 12:00:00 AM
Abstract :
A radial line slot antenna (RLSA) is a high-gain and high-efficiency planar antenna. A linearly polarized RLSA (LP-RLSA) is attractive for applications of various subscriber radio systems. However, the slot arrangement for linear polarization gives rise to serious reflection from slots, which disturbs the normal antenna operation. A new LP-RLSA slot design is presented where reflection canceling slots are added to the conventional ones; four slots form one slot set as a unit radiator of linear polarization. The experiments confirm the design: the antenna return-loss is improved from -2 to -10 dB. Antenna efficiencies of 48 and 54% are measured for 400 and 600-mmφ antennas, respectively. This is the first report of the normal operation of LP-RLSAs
Keywords :
antenna theory; electromagnetic wave polarisation; electromagnetic wave reflection; microwave antenna arrays; waveguide antennas; 400 mm; 48 percent; 54 percent; 600 mm; antenna arrays; antenna efficiencies; antenna return-loss; high-efficiency planar antenna; high-gain; linearly polarized radial line slot antenna; reflection cancelling slot set; subscriber radio systems; unit radiator; Antenna measurements; Degradation; Optical reflection; Phased arrays; Planar arrays; Polarization; Reflector antennas; Satellite antennas; Satellite broadcasting; Slot antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
