Thomas E Turlington

US Patent:

51554925, Oct 13, 1992

Filed:

May 29, 1991

Appl. No.:

7/706664

Inventors:

Francis W. Hopwood - Severna Park MD
Jerry A. Kane - Crofton MD
Thomas R. Turlington - Linthicum MD
David S. Oros - Owings Mills MD

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

H01Q 322
H01Q 324
H01Q 326

US Classification:

342372

Abstract:

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.

US Patent:

57450765, Apr 28, 1998

Filed:

Sep 5, 1996

Appl. No.:

8/708439

Inventors:

Thomas R. Turlington - Linthicum MD
Patrick G. Farrell - Baltimore MD
Gerald K. Kane - Stevensville MD
Gary L. Ferrell - Pasadena MD
Scott K. Suko - Elkridge MD
Joseph A. Faulkner - Ellicott City MD
Gregory K. Sinon - Dayton MD
Francis W. Hopwood - Severna Park MD
Andrew J. Piloto - Columbia MD

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H01Q 324

US Classification:

342372

Abstract:

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.

US Patent:

39939626, Nov 23, 1976

Filed:

Aug 18, 1975

Appl. No.:

5/606041

Inventors:

Francis W. Hopwood - Severna Park MD
Lester K. Staley - Baltimore MD
Thomas R. Turlington - Linthicum MD

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

H03B 304
H03B 536
H03B 538
H03B 2500

US Classification:

331 18

Abstract:

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.

US Patent:

59400315, Aug 17, 1999

Filed:

Apr 7, 1998

Appl. No.:

9/056094

Inventors:

Thomas R. Turlington - Linthicum MD
Patrick G. Farrell - Baltimore MD
Gerald K. Kane - Stevensville MD
Gary L. Ferrell - Pasadena MD
Scott K. Suko - Elkridge MD
Joseph A. Faulkner - Ellicott City MD
Gregory K. Sinon - Dayton MD
Francis W. Hopwood - Severna Park MD
Andrew J. Piloto - Columbia MD

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H01Q 324

US Classification:

342372

Abstract:

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.