Multiple beam microwave apparatus

Details Multiple beam microwave apparatus Multiple beam microwave apparatus

1975-05-30

1976-04-27

Smith, Alfred E.

Communications: radio wave antennas

Antennas

Wave guide type

343756, 343781, 343837, H01Q 1914

Patent

active

039538583

ABSTRACT:
A compact offset Cassegrainian antenna having a paraboloidal main reflector and a convex subreflector brings microwave beams to a focus. A small flat reflector placed in one of the beams at the focus deflects it for interception by a concave reflector and horn. Another beam passing by the flat reflector is intercepted by a second concave reflector and horn. The flat reflector is smaller than a focally located horn, allowing more closely-spaced beams to be accommodated. The flat reflector may be replaced by a curved reflector, a prism, or a microwave lens. Another flat reflector is added for each additional beam. Polarized beams are accommodated by adding a polarization screen.

REFERENCES:
patent: 2983918 (1961-05-01), Parmeggiani
patent: 3195137 (1965-07-01), Jakes, Jr.
patent: 3492484 (1970-01-01), Iti
patent: 3562753 (1971-02-01), Tanaka et al.
patent: 3680141 (1972-07-01), Karikomi
patent: 3792480 (1974-02-01), Graham
patent: 3797020 (1974-03-01), Roger et al.
patent: 3810185 (1974-05-01), Wilkinson

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