US 12,467,962 B2
Passive electromagnetic and thermal noise mitigation method for cryogenic RF devices
Sergio A. Montoya, Chula Vista, CA (US); and Jenna Jones, Campo, CA (US)
Assigned to United States of America as represented by the Secretary of the Navy, Washington, DC (US)
Filed by The United States of America, as represented by the Secretary of the Navy, Arlingtion, VA (US)
Filed on Feb. 22, 2024, as Appl. No. 18/584,658.
Prior Publication US 2025/0271478 A1, Aug. 28, 2025
Int. Cl. G01R 29/08 (2006.01); H01Q 1/22 (2006.01); H01Q 1/42 (2006.01); H05K 9/00 (2006.01)
CPC G01R 29/0871 (2013.01) [H01Q 1/2283 (2013.01); H01Q 1/42 (2013.01); H05K 9/006 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A cryogenic RF device comprising:
a cryogenic enclosure capable of maintaining an internal high-vacuum cryogenic environment, wherein the cryogenic enclosure includes a radome and a vacuum chamber, and wherein the radome is, and the vacuum chamber is not, transparent to desired RF signals;
a cryocooler cold-finger disposed within the cryogenic enclosure such that the cold-finger extends through the vacuum chamber and a tip of the cold-finger is disposed within the radome;
a sensor disposed on the tip of the cold-finger;
electronic circuitry disposed within the vacuum chamber and communicatively connected to the sensor;
an electromagnetic shield disposed within the vacuum chamber so as to shield the electronic circuitry, but not the sensor, from external electromagnetic radiation; and
a thermal shield disposed within the vacuum chamber so as to electrically isolate the electromagnetic shield from vacuum chamber walls, wherein the electromagnetic shield and the thermal shield are electrically- and thermally-isolated from the cold-finger, and wherein the electromagnetic shield is electrically connected to at least one grounded electrical conductor that passes through an electrically-isolated feedthrough on the vacuum chamber.