Northrop Grumman Systems Corporation

Westinghouse Electric Corporation

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

Thomas R Turlington

Francis W Hopwood

Andrew J Piloto

Scott K Suko

Gary L Ferrell

Gregory K Sinon

Patrick G Farrell

Joseph A Faulkner

Gerald K Kane

Lester K Staley

Jerry A Kane

David S Oros

A T/R module including a multilevel, multichip microwave package having a plurality of gallium arsenide monolithic microwave integrated circuit chips (MMICs) implementing RF switching elements, a variable phase shifter, a plurality of RF amplifiers, and gain trim attenuators and which are located on a planar RF assembly. The module's architecture includes shared or common MMIC circuit elements during both transmit and receive operation modes thus reducing the number of MMICs required while at the same time preloading the supply voltage regulator-modulator which supplies DC power to all the MMIC circuits without degrading T/R module efficiency.

Transmit/receive module for planar active apertures

A dual mode active aperture phased array system for pulsed radar and continuous wave applications. The system may be switched between the two modes without appreciable loss of average effective radiated power. Both the voltage and current of the biasing power to the amplifying transistors is varied to accommodate the difference in peak amplitude power while maintaining the optimum average effective radiated power. The DC power supply is a chopper.

Dual mode active aperture

A low noise frequency source utilizes a varactor diode to form a parametric crystal oscillator which may be frequency multiplied to the desired microwave frequency, for radar applications.

Low noise parametric varactor diode crystal oscillator

Growing community of inventors

Linthicum, MD, United States of America

Thomas R Turlington