Polarized signal receiver waveguides and probe

Details Polarized signal receiver waveguides and probe Polarized signal receiver waveguides and probe

1985-11-08

1988-07-05

LaRoche, Eugene R.

Communications: radio wave antennas

Antennas

Wave guide type

333 21A, H01P 1165

Patent

active

047558288

ABSTRACT:
A polarized signal receiver waveguide assembly, or feedhorn, for receiving a selected one of linearly polarized electromagnetic signals in one waveguide of circular cross-section and for launching or transmitting the selected signal into a second waveguide of rectangular cross-section, the axes of the waveguides being disposed at right angle. A probe comprising a signal receiver portion disposed in a plane perpendicular to the axis of the first waveguide and a launch or transmitter portion having its axis perpendicular to the axis of the second waveguide has its launch or transmitter portion mounted in a controllably rotatable dielectric rod, such that rotation of the rod causes rotation of the signal receiver portion for alignment with a selected one of the polarized signals. The transmission line between the probe signal receiver portion and launch or transmitter portion consists of a pair of bifurcated branches forming a rectangle disposed along the axis of the first waveguide. The two waveguides are cast as a single-piece. A scaler ring mounted around the circular waveguide is adjustable in position along the waveguide to improve performance, the set off of the leading edge of the scaler ring from the open end of the waveguide being a function of the focal length to diameter ratio of the disk at the focus of which the feedhorn is installed.

REFERENCES:
patent: 2880399 (1959-03-01), Murphy
patent: 3553707 (1971-01-01), Yang et al.
patent: 3924205 (1975-12-01), Hansen et al.
patent: 4168504 (1979-09-01), Davis
patent: 4414516 (1983-11-01), Howard
patent: 4504836 (1985-03-01), Seavey
patent: 4554553 (1985-11-01), Grim
patent: 4574258 (1986-03-01), Cloutier
patent: 4578681 (1986-03-01), Howard

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