H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
351/51
H01Q 15/02 (2006.01) H01Q 21/00 (2006.01) H01Q 21/20 (2006.01) H01Q 25/00 (2006.01)
Patent
CA 1131351
RADIO FREQUENCY ENERGY ANTENNA Abstract of the Disclosure A radio frequency energy antenna system for directing a collimated beam of radio frequency energy in free space over relatively wide scan angles. The antenna system includes a plurality of antenna elements disposed along a curved path for producing a directed, noncollimated beam of radio frequency energy and a radio frequency lens disposed between the antenna elements and free space for collimating the radio frequency energy in the directed, noncollimated beam to produce the col- limated beam of radio frequency energy in free space. The arrangement of the antenna elements along a curved path produces an amplitude distribution across the collimated beam wavefront which is substantially uniform. A second radio frequency lens has a plurality of array ports coupled to the plurality of antenna elements and a plurality of feed ports, each one being associated with a corresponding collimated beam of radio frequency energy in free space. With such lens the antenna has a relatively wide operating bandwidth. The disposition of the antenna elements along the curved path enables the second lens to be smaller in size and have a shape wherein the array ports and feed ports face one another to a greater degree than if the antenna elements were disposed along a straight line thereby improving the operating effectiveness of the second lens.
338514
Raytheon Company
Smart & Biggar
LandOfFree
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