Constant beamwidth antenna

Details Constant beamwidth antenna Constant beamwidth antenna

H - Electricity

01

Q

351/18

H01Q 19/06 (2006.01) H01Q 17/00 (2006.01) H01Q 21/00 (2006.01)

Patent

CA 1056943

CONSTANT BEAMWIDTH ANTENNA Abstract of the Disclosure 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.

249038

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