Andrew C Roberts

US Patent:

6424308, Jul 23, 2002

Filed:

Dec 6, 2000

Appl. No.:

09/731091

Inventors:

David L. Brundrett - Culver City CA
Andrew L. Roberts - Newhall CA
Brent T. Toland - Manhattan Beach CA
Kenneth A. Hummer - Redondo Beach CA

Assignee:

TRW Inc. - Redondo Beach CA

International Classification:

H01Q 1906

US Classification:

343753, 343909

Abstract:

A wideband matching surface ( ) for a dielectric lens antenna ( ) is formed from a first dielectric layer ( ) (e. g. , Rexoliteâ) characterized by a first refractive index and a second dielectric layer ( ) characterized by a second refractive index supporting the first dielectric layer ( ). The first and second dielectric layers ( ) are formed by periodically removing material from the dielectric layers according to fill factors determined by: The material may, for example, be periodically removed along two axes ( ) to form squares ( ), thereby provided reflected power attenuation for both horizontally and vertically polarized electromagnetic waves.

US Patent:

7034774, Apr 25, 2006

Filed:

Jul 2, 2004

Appl. No.:

10/883876

Inventors:

Steven Szu-Cherng Kuo - Torrance CA, US
Andrew Lee Roberts - Newhall CA, US
James David Ingram - Seal Beach CA, US
Imants Eglitis - Torrance CA, US
Henry Chang - Palos Verdes CA, US

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H01Q 15/02

US Classification:

343909, 343786, 343756

Abstract:

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.

US Patent:

7373712, May 20, 2008

Filed:

Jul 2, 2004

Appl. No.:

10/884107

Inventors:

Steven Szu-Cherng Kuo - Torrance CA, US
Andrew Lee Roberts - Newhall CA, US
James David Ingram - Seal Beach CA, US
Imants Eglitis - Torrance CA, US
Henry Chang - Palos Verdes CA, US

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H01P 11/00

US Classification:

29600, 29601, 343786

Abstract:

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.

US Patent:

7836577, Nov 23, 2010

Filed:

May 6, 2008

Appl. No.:

12/116008

Inventors:

Steven Szu-Cherng Kuo - Torrance CA, US
Andrew Lee Roberts - Newhall CA, US
James David Ingram - Seal Beach CA, US
Imants Eglitis - Torrance CA, US
Henry Chang - Palos Verdes CA, US

Assignee:

Northrop Grumman Systems Corporation - Los Angeles CA

International Classification:

H01P 11/00

US Classification:

29600, 29729, 343786

Abstract:

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.