Communications: radio wave antennas – Antennas – Wave guide type
Patent
1986-01-21
1987-06-09
Lieberman, Eli
Communications: radio wave antennas
Antennas
Wave guide type
333 21A, 333 21R, H01Q 1302
Patent
active
046723889
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, the axes of the waveguides being disposed at a right angle. The first waveguide has a closed end wall, formed as a hemispherical cavity having a hemispherical concave surface. 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 single curvilinear conductor extending over a ninety degree arc parallel to and in close proximity to the hemispherical concave surface of the first waveguide end wall, or, alternatively, of a pair of bifurcated curvilinear branches forming a one-hundred eighty degree arc disposed along the axis of the first waveguide in close proximity to and parallel to the end wall hemispherical surface. The two waveguides are cast as a single-piece.
REFERENCES:
patent: 2880399 (1959-03-01), Murphy
patent: 4504836 (1985-03-01), Seavey
Johnson D.
Lieberman Eli
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