David L Dixon

US Patent:

7366419, Apr 29, 2008

Filed:

Nov 22, 2004

Appl. No.:

10/994570

Inventors:

Kiet D. Ngo - Hermosa Beach CA, US
David P. Dixon - Torrance CA, US
Steven B. Schrier - Hawthorne CA, US

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H04B 10/00

US Classification:

398128, 398121

Abstract:

Apparatus, and a corresponding method, for spatially isolating a transmit beam and a receive beam, which, in satellite communication systems, are inherently separated by a look ahead angle. A receive beam separation mirror is positioned in the receive beam path but out of the transmit beam path, and the receive beam is reflected along a path separated from the transmit beam path. The mirror may be annular, allowing the transmit beam to be directed through the center of the mirror. In applications where a desired isolation angle is different from the look ahead angle, or where there is no look ahead angle, the receive beam separation mirror is used in conjunction with a dichroic beam splitter and at least one receive beam steering mirror, to achieve the desired angular separation.

US Patent:

20050056785, Mar 17, 2005

Filed:

Sep 16, 2003

Appl. No.:

10/663310

Inventors:

Mau-Song Chou - Rancho Palos Verdes CA, US
Larry Yujiri - Redondo Beach CA, US
David Dixon - Torrance CA, US

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

G01J005/00

US Classification:

250338100

Abstract:

A system for detecting and analyzing chemical and biological materials in a sample. The system includes a spectrometer for passively receiving emissions from the sample in the terahertz frequency band to detect the materials therein. A telescope or other device can be used to confine the field-of-view of the spectrometer. A cold surface is positioned filling the field-of-view of the spectrometer at an opposite side of the sample from the spectrometer. The cold surface provides a low temperature background relative to the sample so as to reduce the background emission and enhance the detection of the emission from the sample.

US Patent:

41260082, Nov 21, 1978

Filed:

Sep 2, 1977

Appl. No.:

5/830221

Inventors:

David A. Dixon - Palatine IL

Assignee:

Standard Oil Company (Indiana) - Chicago IL

International Classification:

E02B 1702

US Classification:

405207

Abstract:

A folding sea-floor compactable template for proper positioning and spacing of subsea piles and wells in the sea floor. Anchor pile templates or well templates are provided at the end of long hinged arms which extend radially out from a central section (which may also be used as a well template). The arms are folded back over the central section for transportation. Flotation can be in the main central section. With additional flotation at the outer ends of the arms, installation can be carried out by controlled submergence in stages from a single barge.