Antenna system having azimuth rotating directive beam with selec

Details Antenna system having azimuth rotating directive beam with selec Antenna system having azimuth rotating directive beam with selec

1988-12-22

1990-07-03

Wimer, Michael C.

Communications: radio wave antennas

Antennas

With polarization filter or converter

343781R, 343781CA, 343839, H01Q 1522, H01Q 19195

Patent

active

049395262

ABSTRACT:
A rotating reflector is used to provide a beam scan throughout a predetermined angle such as 360.degree.. A circular polarizer is coupled with the reflector and converts received linearly polarized energy into circularly polarized energy. A fixed feed is configured to receive the reflected circularly polarized energy and converts such energy to linearly polarized energy. The antenna system can receive the same linear polarization of energy throughout its 360.degree. scan angle without polarization mismatch or orthogonal polarization losses. The relative orientation of the two polarizers may be adjusted to receive any orientation of linear polarization of energy throughout the scan angle. For example, they may be oriented so that the antenna system receives vertically polarized energy, slant 45.degree. linearly polarized energy, or horizontally polarized energy.

REFERENCES:
patent: 3230537 (1966-01-01), Bartholoma
patent: 3943519 (1976-03-01), Bui-Hai
patent: 4109253 (1978-08-01), Chu
patent: 4144535 (1979-03-01), Dragone
patent: 4575726 (1986-03-01), Gounder
patent: 4599623 (1986-07-01), Havkin et al.
patent: 4625214 (1986-11-01), Parekh
patent: 4672334 (1987-06-01), Saad
Introduction to Radar Systems, M. I. Skolnik, 2d., 1980, McGraw-Hill, pp. 242-244.

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