USA As Represented by Secretary of the Navy

Jenna Jones

Sergio A Montoya

Benjamin J Taylor

Anna Leese De Escobar

A cryogenic RF device comprising: a cryogenic enclosure, a cryocooler cold-finger, a sensor, an electromagnetic shield, and a thermal shield. The cryogenic enclosure is capable of maintaining an internal high-vacuum cryogenic environment and includes a radome and a vacuum chamber. The radome is, and the vacuum chamber is not, substantially transparent to desired RF signals. The sensor is disposed on the tip of the cold-finger in the radome. The electromagnetic shield is disposed within the vacuum chamber so as to shield electronic circuitry, but not the sensor, from external electromagnetic radiation. The thermal shield is disposed within the vacuum chamber so as to electrically isolate the electromagnetic shield from vacuum chamber walls. The electromagnetic shield and the thermal shield are electrically- and thermally-isolated from the cold-finger. The electromagnetic shield is electrically connected to at least one grounded electrical conductor that passes through an electrically-isolated feedthrough on the vacuum chamber.

Passive electromagnetic and thermal noise mitigation method for cryogenic RF devices

A magnetic field detector for detecting magnetic fields over a broad operational temperature range comprising: a plurality of Josephson junctions connected to each other by superconducting interconnecting paths, wherein the plurality of Josephson junctions are arranged in an array; and wherein the superconducting interconnecting paths connecting the plurality of Josephson junctions in the array are designed to not all have a uniform cross-sectional geometry with respect to each other.

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Campo, CA, United States of America

Jenna Jones