Antenna array of radiators with plural orthogonal ports

Details Antenna array of radiators with plural orthogonal ports Antenna array of radiators with plural orthogonal ports

1994-12-05

1996-07-02

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Wave guide type

343853, 333 21A, H01Q 1300

Patent

active

055327060

ABSTRACT:
A phased array antenna (10A, 10B, 10C) is constructed of an array of radiators (24), each of which has a radiating aperture, a first port (26) and a second port (26). The first port introduces a first radiation with a first polarization, and the second port introduces a second radiation with a second polarization which is orthogonal to the first polarization. Individual transmitting amplifiers, in the case of a transmitting array, or individual receiving amplifiers (16A), in the case of a receiving array, are connected to the ports of each of the radiators. The amplifiers associated with the first ports of the respective radiators are connected, in turn, to phase shifters (18A) and attenuators (20A) which constitute a first beamformer for forming a set of one or more beams of radiation. The amplifiers (16A) associated with the second ports of the respective radiators are connected, in turn, to phase shifters (18A) and attenuators (20A) which constitute a second beamformer for forming a set of one or more beams of radiation. The two beamformers operate independently of each other so as to permit separately weighted polarization signals of the antenna to be programmed electronically for various polarizations such as right and left circular polarization or horizontal and vertical polarization. Also, the separately polarized waves associated with the first ports and the second ports permit dual polarization frequency reuse transmission.

REFERENCES:
patent: 3868695 (1975-02-01), Kadak
patent: 3922680 (1975-11-01), Alsberg et al.
patent: 4414550 (1983-11-01), Tresselt
patent: 4939527 (1990-07-01), Lamberty et al.
patent: 4962383 (1990-10-01), Tresselt
patent: 5214394 (1993-05-01), Wong
patent: 5304999 (1994-04-01), Roberts et al.

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