Northrop Grumman Systems Corporation

Trw Limited

Steven Szu-Cherng Kuo

Henry Ping Chang

Andrew Lee Roberts

Imants Eglitis

James David Ingram

Te-Kao Wu

Chun-Hong Harry Chen

A method for making a feed structure for an antenna may include providing a polarizer body having a polarizer sidewall extending longitudinally between spaced apart ends. A portion of the polarizer sidewall is deformed to provide at least one polarizing structure that extends radially inwardly along an interior of the polarizer sidewall relative to adjacent portions of the polarizer sidewall. The method thus can be utilized to produce an antenna structure.

Method for making an antenna structure

A polarizer for an antenna and antenna structures are disclosed. According to one aspect a polarizer includes a generally cylindrical sidewall portion extending between spaced apart end portions. At least one polarizing structure extends substantially continuously along an interior of the sidewall portion and extends radially inwardly relative to the sidewall portion according to a first radius in a longitudinal direction and a second radius in a transverse direction. The polarizer can be implemented as part of an antenna structure, which further can be integrated with a transition stage and/or a horn.

Feed structure and antenna structures incorporating such feed structures

A phased antenna array ( ) for use on a satellite, that employs a density tapering technique for positioning the antenna elements ( ) in the array ( ) to reduce co-channel interference between adjacent cells. Particularly, the spatial position of the various antenna elements ( ) in the array ( ) are spread out so that the center portion of the array ( ) has the highest density of elements ( ), and the outer portion of the array ( ) has the lowest density of elements ( ). Predetermined schemes are used to set the density of the elements ( ) in the array ( ). By providing fewer antenna elements ( ) at the outer portion of the array ( ), the beam side lobes are reduced.

Density tapered transmit phased array

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Torrance, CA, United States of America

Steven Szu-Cherng Kuo