Multiple frequency band, multiple beam microwave antenna system

Details Multiple frequency band, multiple beam microwave antenna system Multiple frequency band, multiple beam microwave antenna system

1980-12-29

1982-07-27

Moore, David K.

Communications: radio wave antennas

Antennas

Antenna with parasitic reflector

343838, 343837, H01Q 2100

Patent

active

043420362

ABSTRACT:
A single microwave-reflective antenna "dish" can be used in combination with a plurality of multiple-beam microwave feed arrays to generate or receive multiple-beam-path microwave radiation in several different frequency bands. Each of the feed arrays may operate in a discrete band of frequencies, with the combined radiations of all the arrays illuminating the reflector along a single axis. The optical system is based on the Newtonian model, such that the radiations from several arrays located off the principal axis may be combined by corresponding frequency-sensitive reflective surfaces located on the principal axis. Each of these reflective surfaces serves to direct the radiations from a single feed array toward the reflective antenna, and reciprocally, to direct radiation from the antenna to the associated feed array. By using frequency-sensitive surfaces as reflectors, a number of feed arrays can be positioned along the principal axis, the associated reflectors being reflective only at the frequency of the feed array concerned, and transparent at other frequencies.

REFERENCES:
patent: 2703506 (1955-03-01), Kelly
patent: 3148370 (1964-09-01), Bowman
patent: 3231892 (1966-01-01), Matson et al.
patent: 3261850 (1966-10-01), Hannan et al.
patent: 3271771 (1966-09-01), Hannan et al.
patent: 3769623 (1973-10-01), Fletcher et al.
patent: 3842421 (1974-10-01), Rootsey et al.
patent: 3953858 (1976-04-01), Ohm
patent: 4017865 (1977-04-01), Woodward

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