High aperture-efficient, wide-angle scanning offset reflector an

Details High aperture-efficient, wide-angle scanning offset reflector an High aperture-efficient, wide-angle scanning offset reflector an

1991-05-06

1992-12-29

Hille, Rolf

Communications: radio wave antennas

Antennas

Antenna with parasitic reflector

343912, 343914, H01Q 1912

Patent

active

051755629

ABSTRACT:
A single offset reflector antenna is disclosed which provides .+-.30.degree. of horizontal scanning and 0.degree. to +15.degree. of vertical scanning without aperture blockage, while maintaining high aperture efficiency, and 0.degree. to -30.degree. of vertical scanning with moderate aperture blockage. The sufrace of the reflector antenna is described by a sixth order polynomial equation. Curvature of the horizontal cross-section of the surface taken through its center is determined by a fourth order even polynomial expression with coefficients that are found by a numerical minimization technique. Further terms, including terms of up to sixth order and their associated coefficients obtained by the numerical minimization technique, define the curvature of the vertical cross-sections of the surface to yield a three-dimensional unitary reflecting surface.

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