Constant beamwidth antenna

Details Constant beamwidth antenna Constant beamwidth antenna

1975-05-01

1976-06-15

Lieberman, Eli

Communications: radio wave antennas

Antennas

With spaced or external radio wave refractor

343854, H01Q 1906

Patent

active

039640698

ABSTRACT:
An antenna assembly for radio frequency energy is disclosed wherein individual antenna elements making up an array are fed in an improved manner so that the width of a directive beam, or beams, formed by such elements is, or are, maintained substantially constant over a wide band of operating frequencies. The antenna assembly includes a printed circuit lens having a plurality of feedports coupled to a like plurality of the antenna elements through different constrained electrical paths. The desired operating characteristic is attained by disposing radio frequency energy absorbing material of varying length in the constrained electrical paths, to selectively attenuate radio frequency energy to the antenna elements as operating frequency is changed, with the result that the width of the beam, or beams, radiated from the array of antenna elements remains substantially constant over a wide band of operating frequencies.

REFERENCES:
patent: 3314071 (1967-04-01), Lader et al.

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