Charles Michael Rhoads

US Patent:

6366259, Apr 2, 2002

Filed:

Jul 21, 2000

Appl. No.:

09/621022

Inventors:

James A. Pruett - Plano TX
James F. Kviatkofsky - Allen TX
Bill R. Norvell - Richardson TX
Charles M. Rhoads - Mckinney TX
Timothy E. Adams - Allen TX
Billy Powers, Jr. - Richardson TX

Assignee:

Raytheon Company - Lexington MA

International Classification:

H01Q 2110

US Classification:

343853, 343767, 343700 MS

Abstract:

An antenna structure and associated method are disclosed that provides a lightweight and reduced-cost antenna element. The antenna structure may include a printed circuit board material coupled to a support structure. The printed circuit board may include electrical circuitry patterns and may have components mounted thereon to provide desired transmit and receive functionality, for example, to provide radio frequency transmit/receive functionality along with phase shifter and control circuitry. The support structure may be a light-weight material, for example, a space-qualified foam material that is strong and light-weight. The combined antenna structure of the present invention may thereby form a strong, rigid and light-weight antenna structure that may be used as sub-array elements in an antenna array, such as an ESA system.

US Patent:

56615949, Aug 26, 1997

Filed:

May 30, 1995

Appl. No.:

8/454463

Inventors:

Charles M. Rhoads - Plano TX
Gary Frazier - Garland TX
Richard G. Hoffman - Plano TX
Oren B. Kesler - Plano TX
Daniel J. Ryan - Sycamore IL

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G02F 129

US Classification:

359299

Abstract:

Generally and in one form of the invention this is a periodic surface filter comprising at least one element at a surface of the filter and electronic controls to change the optical characteristics of the element. Other methods and devices are disclosed.

US Patent:

56193653, Apr 8, 1997

Filed:

May 30, 1995

Appl. No.:

8/453531

Inventors:

Charles M. Rhoads - Plano TX
Gary Frazier - Garland TX
Richard G. Hoffman - Plano TX
Oren B. Kesler - Plano TX
Daniel J. Ryan - Sycamore IL

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G02F 103

US Classification:

359248

Abstract:

Generally and in one form of the invention this is a periodic surface filter comprising at least one element at a surface of the filter and electronic controls to change the optical characteristics of the element. The surface filter comprising and electronically tunable electro-optic material to alter the resonant frequency of the element.

US Patent:

51190524, Jun 2, 1992

Filed:

Oct 23, 1990

Appl. No.:

7/601557

Inventors:

Larry C. Witkowski - Dallas TX
Hua Q. Tserng - Dallas TX
Robert C. Voges - Dallas TX
Charles M. Rhoads - Plano TX
Oren B. Kesler - Plano TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H01P 115

US Classification:

333258

Abstract:

A GaAs monolithic waveguide switch and system for low power consumption and high frequency switching wherein a single GaAs chip is flip-chip mounted onto a waveguide slot and inserted between interconnecting waveguides to provide single pole single throw switching. The GaAs chip includes an array of MESFETs along with connecting electrodes configured to provide low loss in the biased state and high loss in the unbiased state. The use of a single GaAs monolithic chip provides improved RF performance and manufacturability over discrete devices and provides lower power consumption as compared with silicon PIN diode waveguide switches.

US Patent:

6028692, Feb 22, 2000

Filed:

May 30, 1995

Appl. No.:

8/453302

Inventors:

Charles M. Rhoads - Plano TX
Gary Frazier - Garland TX
Richard G. Hoffman - Plano TX
Oren B. Kesler - Plano TX
Daniel J. Ryan - Sycamore IL

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G02F 103

US Classification:

359245

Abstract:

Generally and in one form of the invention this is a periodic surface filter comprising at least one element at a surface of the filter and electronic controls to change the optical characteristics of the element. Other methods and devices are disclosed.

US Patent:

56190611, Apr 8, 1997

Filed:

Oct 31, 1994

Appl. No.:

8/332282

Inventors:

Charles Goldsmith - Plano TX
Bradley M. Kanack - Desoto TX
Bill R. Norvell - Richardson TX
Lily Y. Pang - McKinney TX
Billy Powers - Richardson TX
Charles Rhoads - McKinney TX
David Seymour - Plano TX

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

H01L 2900

US Classification:

257528

Abstract:

Micromechanical microwave switches with both ohmic and capacitive coupling of rf lines and integration in multiple throw switches useful in microwave arrays.

US Patent:

56276729, May 6, 1997

Filed:

May 30, 1995

Appl. No.:

8/453328

Inventors:

Charles M. Rhoads - Plano TX
Gary Frazier - Garland TX
Richard G. Hoffman - Plano TX
Oren B. Kesler - Plano TX
Daniel J. Ryan - Sycamore IL

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G02F 103

US Classification:

359248

Abstract:

Generally and in one form of the invention this is a periodic surface filter comprising at least one element at a surface of the filter and electronic controls to change the optical characteristics of the element. The surface filter is used as a switchable filter in a cavity for a Q-switch.

US Patent:

56193661, Apr 8, 1997

Filed:

May 30, 1995

Appl. No.:

8/454462

Inventors:

Charles M. Rhoads - Plano TX
Gary Frazier - Garland TX
Richard G. Hoffman - Plano TX
Oren B. Kesler - Plano TX
Daniel J. Ryan - Sycamore IL

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G02F 103

US Classification:

359248

Abstract:

Generally and in one form of the invention this is a periodic surface filter comprising at least one element at a surface of the filter and electronic controls to change the optical characteristics of the element. Other methods and devices are disclosed.