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

Volume

40

Issue

4

fYear

1992

fDate

4/1/1992 12:00:00 AM

Firstpage

433

Lastpage

438

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;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.138845

Filename

138845