Shaped beam reflector antenna

Communications: radio wave antennas – Antennas – Antenna components

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Details

H01Q 1516

Patent

active

046059350

ABSTRACT:
A shaped beam antenna of the type comprising a main reflector and a feed horn for irradiating an electromagnetic wave upon said main reflector, the main reflector including, in sectional planes inclusive of a Y-Z plane and planes parallel thereto, a central section and horizontal side end sections adjoining the central section, where Cartesian coordinates are assumed having an origin near the feed horn, a Z-axis extending in a direction of the horizontal center axis of the feed horn, and X- and Y-axes extending in planes perpendicular to the Z-axis. The central section has a plurality of torus reflector segments and each of the side end sections has a plurality of parabolic reflector segments, and the torus and parabolic reflector segments are grouped into first and second portions, the first portion having the reflector segments which are symmetrical with respect to the Y-Z plane, the second portion having first and second sub-portions, the reflector segments of the first sub-portion and those of the second sub-portion being asymmetrical with respect to the Y-Z plane, whereby the maximum radiation direction of the beam reflected from the first portion lies in the Y-Z plane, and the maximum radiation direction of the beam reflected from the second portion lies in planes other than the Y-Z plane.

REFERENCES:
patent: 3995275 (1976-11-01), Betsudan et al.

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