The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 03, 1995
Filed:
Aug. 10, 1994
Raymond R Blasing, San Jose, CA (US);
Edwin F Johnson, Sunnyvale, CA (US);
Douglas G Lockie, Los Gatos, CA (US);
Cliff Mohwinkel, San Jose, CA (US);
Barry Whalen, Los Altos, CA (US);
Richard S Withers, Sunnyvale, CA (US);
Conductus, Inc., Sunnyvale, CA (US);
Abstract
An array antenna includes a means of thermally isolating the feed network from the space illuminated by the antenna. Filtering layers are incorporated into the structure between the feed and the radiating patches. These filtering layers are transparent to radiation in the frequency range of operation of the antenna, primarily microwaves and millimeter waves, but reflect much shorter wavelengths such as infrared and visible light. This rejection of short wavelengths results in reduced heating of the feed network and so to a reduced heat load on a cooling system. One preferred embodiment employs the radiation shield to advantage by incorporating superconductive elements in the antenna. These elements can be cooled efficiently enough to be practical due to the rejection of heat by the incorporated filtering layers.