Coaxial antenna configuration with high inter-element isolation

Details Coaxial antenna configuration with high inter-element isolation Coaxial antenna configuration with high inter-element isolation

1981-07-20

1984-07-10

Lieberman, Eli

Communications: radio wave antennas

Antennas

Spiral or helical type

343909, H01Q 152, H01Q 136

Patent

active

044595964

ABSTRACT:
A two-antenna array includes first and second coaxial antenna members spaced such that the fore member is in the distant (far) front lobe field of the aft element. Each antenna member includes a like-oriented circularly polarized antenna element with microwave absorbing material disposed in a cavity about its aft, back lobe direction.
A high degree of electrical isolation exists between antennas by reason of the aggregate inter-element transmission losses resulting from (i) space propagation loss, (ii) antenna front-to-back discrimination, and (iii) polarization isolation.

REFERENCES:
patent: 3599220 (1971-08-01), Dempsey
patent: 3683385 (1972-08-01), Corzine et al.
patent: 3710333 (1973-01-01), Crom
patent: 3735409 (1973-05-01), Gershberg et al.
patent: 4095230 (1978-06-01), Salmond et al.

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