Antenna system with multiple frequency inputs

Details Antenna system with multiple frequency inputs Antenna system with multiple frequency inputs

1978-07-19

1980-07-15

Moore, David K.

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

343814, 343858, H01Q 2100

Patent

active

042131324

ABSTRACT:
An improved antenna system is disclosed in which a single antenna array is simultaneously used in conjunction with several independent radio devices. Isolated and independent radio transmitters are coupled, without any signal cancellation, to each and every one of a plurality of isolated independent antenna elements by a combining network which maintains the isolation between each of the radio transmitters and each of the antenna elements. The combining network comprises an array of hybrid networks and creates a predetermined electrical phase difference between each signal received by an individual antenna element. The antenna elements form a single antenna array consisting of circularly disposed corner reflector antennas. Each reflector independently creates an individual radiation pattern and these patterns combine to form a single desired composite radiation pattern. By maintaining isolation between each of a number of radio transmitters, a plurality of these transmitters may be used simultaneously in conjunction with a single antenna array.

REFERENCES:
patent: 3202997 (1965-08-01), Schell
patent: 3255450 (1966-07-01), Butler
patent: 3295134 (1966-12-01), Lowe
patent: 3518695 (1970-06-01), Schroeder
patent: 3714661 (1973-01-01), Kershaw
patent: 3731316 (1973-05-01), Sheleg
patent: 3740756 (1973-06-01), Sosin
patent: 3916417 (1975-10-01), Wong et al.

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