Integrated circularly polarized horn antenna

Details Integrated circularly polarized horn antenna Integrated circularly polarized horn antenna

1976-09-24

1979-02-20

Smith, Alfred E.

Communications: radio wave antennas

Antennas

With polarization filter or converter

343786, H01Q 1302, H01Q 1508

Patent

active

041410130

ABSTRACT:
A horn antenna is disclosed having a built-in circular polarizer and a cross polarization attenuator. A square-apertured horn antenna has a plurality of pairs of conductive fins disposed along opposite edges of the horn interior. The individual fins are separated from each other by approximately one-fourth wavelength. The fins are at a 45 degree angle to that linear wave and react with that linear wave by imparting a circular rotation to that wave as the wave propagates past each pair of fins. A stepped attenuator is mounted in the input section to the horn antenna perpendicular to the linear input wave. The attenuator substantially absorbs cross-polarized signals whether reflected from the aperture of the horn or provided by the incoming signal.

REFERENCES:
patent: 2933731 (1960-04-01), Foster et al.
patent: 3201717 (1965-08-01), Grosbois et al.
patent: 3624655 (1971-11-01), Sato et al.
patent: 3668567 (1972-06-01), Rosen
patent: 3680145 (1972-07-01), Beguin
patent: 3955202 (1976-05-01), Young

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