Rockwell Collins, Inc.

Bret W Spars

James B West

Daniel L Woodell

John C Mather

Brian J Herting

Wajih A ElSallal

An aperture of an antenna for a radar system comprises a first waveguide comprising a first protrusion and a second protrusion, each protrusion extending longitudinally along one side of the first waveguide. The aperture further comprises a second waveguide comprising a third protrusion and a fourth protrusion, each protrusion extending longitudinally along one side of the second waveguide. The first and third protrusions and second and fourth protrusions adjoin to form a radio frequency choke at least partially suppressing cross polarization of radio frequencies between the first and second waveguides.

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Marion, IA, United States of America

Bret W Spars