Antenna exhibiting azimuth and elevation beam shaping characteri

Details Antenna exhibiting azimuth and elevation beam shaping characteri Antenna exhibiting azimuth and elevation beam shaping characteri

1998-06-29

2000-06-06

Le, Hoanganh

Communications: radio wave antennas

Antennas

With spaced or external radio wave refractor

343754, 343909, 343911R, H01Q 1906

Patent

active

060724374

ABSTRACT:
Varying the azimuth and elevation beam patterns for an antenna. For a horn-type antenna implemented by a parallel-plate waveguide structure, an input port can accept an electromagnetic signal and an output slot can transmit the electromagnetic signal. An azimuth lens can be placed proximate to the output slot for adjusting the antenna beam pattern within the azimuth plane. The azimuth lens comprises two or more lens elements, each typically having a cylindrical shape and comprising a dielectric material, which support the generation of discrete beams in the azimuth plane in response to the electromagnetic signal output by the output slot. These discrete beams can sum in-phase to form a composite beam having a shape or pattern generally defined by the characteristics of the azimuth lens elements. Specifically, this composite beam has a pattern within the azimuth plane defined by the size and shape of the azimuth lens elements and the spacing between these elements. In addition, the horn-antenna can include an elevation lens that can rotate within the internal parallel-plate structure of the horn-type antenna to vary the beam pattern within the elevation plane.

REFERENCES:
patent: 2785397 (1957-03-01), Rust et al.
patent: 4065772 (1977-12-01), Seavey
patent: 4660050 (1987-04-01), Phillips
patent: 5642121 (1997-06-01), Martek et al.
patent: 5905457 (1999-05-01), Rashid

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