Circularly polarized leaky waveguide doppler antenna

Details Circularly polarized leaky waveguide doppler antenna Circularly polarized leaky waveguide doppler antenna

1986-01-14

1987-10-06

Sikes, William L.

Communications: radio wave antennas

Antennas

With polarization filter or converter

343771, 343779, 343909, H01Q 1524

Patent

active

046986391

ABSTRACT:
An apparatus and a method for achieving simultaneous circular polarization of a four-beam doppler antenna wherein four different grid layers are positioned into a radome. The first grid layer, besides radiating a linear polarized beam, is used to partially reduce contaminants of the linearly polarized beam by means of cross-hatch strips. The second grid layer is used to further purify the linear polarized beam such that an essentially purified linear polarized beam is obtained. The third grid layer, designed according to certain equations, is used to convert the purified linearly polarized beam into a partially circularly polarized beam. And the fourth grid layer is used to make sure that the circularly polarized beam is perfectly matched.

REFERENCES:
patent: 4479128 (1984-10-01), Brunner et al.
patent: 4599623 (1986-07-01), Havkin et al.

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