Northrop Grumman Systems Corporation

United States of America As Represented by the Secretary of the Air Force

Benjamin R Myers

John W Gipprich

Ronald G Freitag

Tapan K Gupta

Cynthia W Berry

Mike L Salib

Vincent G Karasack

Joseph A Faulkner

Brian T McMonagle

Michael J Lee

David P Parrish

Ty L Barkdoll

Richard S White

Gene A Digennaro

Eric D Zirofsky

Eric V Miller

Harry V Guy, Iii

Charles R Robinson

Robert Q Wenerick

Bradley L McCarthy

Dave M Krafcsik

Kurt G Ramsey

Robert B Middleton

Gary I Kosanovic

John P Vitamvas

Kerron R Duncan

Thomas M Walsh

A multi-channel, dual-band, radio frequency (RF) transmit/receive (T/R) module, for an active electronically scanned array, is provided. The module includes a compact, RF manifold connector and at least four T/R channels. Each of the T/R channels includes a notch radiator, a diplexer coupled to the notch radiator, a power amplifier, including at least one dual-band gain stage, coupled to the notch radiator, a low noise amplifier, including at least one lower-band gain stage and at least one upper-band gain stage, coupled to the diplexer, and a T/R cell, including a phase shifter, a signal attenuator and at least one dual-band gain stage, coupled to the power amplifier, the low noise amplifier and the manifold connector.

Dual band quadpack transmit/receive module

A phased array antenna tile which is steered by microelectromechanical system (MEMS) switched time delay units (TDUs) in an array architecture which reduces the number of amplifiers and circulators needed for implementing an active aperture electronically scanned array antenna so as to minimize DC power consumption, cost and mass of the system, making it particularly adaptable for airborne and spaceborne radar applications.

Phased array antenna for space based radar

On an element-by-element basis, measure phases between signals at Port A to Port B of the antenna feed network to get a phase measurement angle that corresponds to an angular difference between outgoing radar signals and target echo return signals; apply a least squares fit equation to the angular distance to get a correction phase slope across the array, &dgr; , and applying a phase slope correction of &dgr; to the phases of the transmitted signal.

&ldquo;On aircraft&rdquo; elevation boresight correction procedure for the E-3 antenna

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Columbia, MD, United States of America

Benjamin R Myers