John L Bartholomew

US Patent:

58859063, Mar 23, 1999

Filed:

Aug 19, 1996

Appl. No.:

8/697109

Inventors:

Robert L. Reynolds - Los Angeles CA
John R. Bartholomew - Torrance CA
Kenneth J. Schmidt - Anaheim CA

Assignee:

Hughes Electronics - Los Angeles CA

International Classification:

H01Q 128
B32B 1502
B32B 1508
B32B 1514
B32B 3300

US Classification:

442 6

Abstract:

A mesh material for a spacecraft antenna reflector is disclosed. The mesh material has a base material made from a dielectric fabric. A conductive material, such as nickel, is applied to the dielectric mesh. The type and thickness of the conductive material is adjusted to regulate the final conductivity of the reflective surface to a predefined range. The present invention utilizes a range that reduces PIM while at the same time maintains a high degree of RF reflectivity. The preferred range is 0. 01 to 10 ohms per square.

US Patent:

58183957, Oct 6, 1998

Filed:

Jan 16, 1997

Appl. No.:

8/783710

Inventors:

James L. Wolcott - La Mirada CA
John R. Bartholomew - Torrance CA
Charles W. Chandler - San Gabriel CA

Assignee:

TRW Inc. - Redondo Beach CA

International Classification:

H01Q 1506

US Classification:

343753

Abstract:

A waveguide lens antenna system is shown which includes a collapsible support structure and a collapsible waveguide lens array. The collapsible waveguide lens array includes a plurality of integrally connected tubular waveguide cells that form an array which focuses transmitted signals onto a satellite signal processing device. The array is coupled to a support structure that is affixed to a mounting surface, such as a satellite, and that correctly positions the array when the array is operationally deployed.