Internal thermal isolation layer for array antenna

Details Internal thermal isolation layer for array antenna Internal thermal isolation layer for array antenna

1994-08-10

1995-10-03

Hajec, Donald

Communications: radio wave antennas

Antennas

Microstrip

343909, 343756, H01Q 138, H01Q 1524

Patent

active

054555949

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.

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