Aperture antenna having nonuniform resistivity

Details Aperture antenna having nonuniform resistivity Aperture antenna having nonuniform resistivity

1987-06-23

1990-10-23

Sikes, William L.

Communications: radio wave antennas

Antennas

Wave guide type

343772, H01Q 1914

Patent

active

049658697

ABSTRACT:
An aperture antenna is provided having a substantially smooth and continuous concave reflective surface disposed about a longitudinal axis. The reflective surface has a peripheral edge lying in a first plane substantially perpendicular to the longitudinal axis, a transition boundary lying in a second plane substantially parallel to the first plane, and a transition zone located between the transition boundary and the peripheral edge. The reflective surface has surface resistivity in a selected portion of the transition zone substantially adjacent to the peripheral edge that is nonuniform as a function of positon on the reflective surface.

REFERENCES:
patent: 2253501 (1941-08-01), Barrow
patent: 2692336 (1954-10-01), Kock
patent: 2743440 (1956-04-01), Riblet
patent: 3624655 (1971-11-01), Sato et al.
patent: 3631504 (1971-12-01), Suetaki
patent: 3831176 (1974-08-01), Epis et al.
patent: 4141015 (1979-02-01), Wong et al.
patent: 4198639 (1980-04-01), Killion

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