Radio frequency antenna

Details Radio frequency antenna Radio frequency antenna

1993-02-09

1993-12-07

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Slot type

343770, H01Q 1310

Patent

active

052687015

ABSTRACT:
An improved dual polarized antenna element for use in planar array antennas. The antenna element includes a conductive sheet having a forwardly positioned notch and a pair of spaced rearwardly extending slot portions formed therein. The notch is adapted for coupling radio frequency energy between free space and the antenna element and the pair of slot portions are electrically coupled to the notch. A power divider/combiner is provided and is preferably interconnected with a power combiner/divider through branches of equal phase length. With this arrangement, reactive power divider induced off-axis scan blindness caused by an odd mode coupled field is prevented. Additionally, an antenna module comprising a pair of such antenna elements disposed in intersecting relationship is provided with a coincident phase center.

REFERENCES:
patent: 3836976 (1974-09-01), Monser et al.
patent: 4001834 (1977-01-01), Smith
patent: 4853704 (1989-08-01), Diaz et al.
patent: 4905013 (1990-02-01), Reindel
patent: 4978965 (1990-12-01), Mohuchy
patent: 5081466 (1992-01-01), Bitter, Jr.

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