Apparatus capable of receiving circularly polarized signals

Details Apparatus capable of receiving circularly polarized signals Apparatus capable of receiving circularly polarized signals

1996-03-19

1997-09-16

Le, Hoanganh T.

Communications: radio wave antennas

Antennas

Microstrip

343846, 343848, 343858, H01Q 138

Patent

active

056685580

ABSTRACT:
An apparatus capable of receiving right-handed and left-handed circularly polarized signals for use in a parabolic reflector antenna comprises a first dielectric plate with a square shape, a square patch antenna prepared in a center of the first dielectric plate, a ground plate located under the first dielectric plate, a cross slot prepared in the ground plate, a second dielectric plate, a signal reception feedline prepared on a bottom surface of the second dielectric plate, a set of two output feedlines prepared on the bottom surface of the second dielectric plate, and a switching circuit enabling the signal reception feedline to receive either the right-handed circularly polarized signal or the left-handed circularly polarized signal. The inventive apparatus is smaller, cheaper, and easier to manufacture than conventional polarizers incorporated in parabolic reflector antennae.

REFERENCES:
patent: 5241321 (1993-08-01), Tsao
patent: 5448250 (1995-09-01), Day
patent: 5471664 (1995-11-01), Kim

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