Northrop Grumman Systems Corporation

Loc B Chau

Sudhakar K Rao

Dah-Weih Duan

Arun K Bhattacharyya

Steven J Mass

Gregory P Krishmar-Junker

Philip W Hon

Shih-En Shih

Dana Quincey

David I Stones

An exemplary antenna array has first self-complementary antenna cells, e.g. bowtie antennas, disposed in a first plane in rows and columns. Additional bowtie antenna cells are disposed in a second plane parallel to the first plane and are aligned in corresponding rows and columns. A first stripline disposed between the first and second planes carries RF signals to/from the first and second bowtie antenna cells. A slot feed couples the RF signals between the first stripline and each of the first and second bowtie antenna cells. A conductive layer in a third plane parallel to the first and second planes serves as a ground plane for signals radiated from/to the first and second bowtie antenna cells.

Antenna array using sandwiched radiating elements above a ground plane and fed by a stripline

A flared feed horn including a plurality of signal lines deposited on a bottom surface of a substrate and forming part of a TEsum mode launcher, a ground plane deposited a top surface of the substrate, and an outer conductor electrically coupled to the ground plane and having an internal chamber, where the conductor includes a flared portion and a cylindrical portion. The outer conductor includes an opening opposite to the substrate defining an aperture of the feed horn. The feed horn also includes an embedded conductor positioned within the chamber and being coaxial with the outer conductor, where the embedded conductor is in electrical contact with the plurality of signal lines. The feed horn also includes a TEdifference mode launcher electrically coupled to the outer conductor proximate the aperture.

Compact wide band, flared horn antenna with launchers for generating circular polarized sum and difference patterns

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Fullerton, CA, United States of America

Loc B Chau