USA As Represented by Secretary of the Navy

Sergio A Montoya

Benjamin J Taylor

Anna Leese De Escobar

Jenna Jones

Susan Anne Elizabeth Berggren

Nicholas Biagio Ferrante

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

An electronic package includes a mounting platform for mounting an electrically small device, at least one coil, and an insulator. The coil regulates a magnetic field through the electrically small device at the mounting platform. The coil is adapted to conduct a current for nullifying the magnetic field through the electrically small device at the mounting platform. The insulator is between the mounting platform and the coil for isolating the electrically small device from the coil. An electronic circuit includes this electronic package and the electrically small device mounted at the mounting platform of the electronic package. The electrically small device can be a quantum device and/or a topological device when cooled to a cryogenic temperature. The magnetic field is nullified to prevent the magnetic field from adversely affecting the electrically small device.

Electronic package for an electrically small device with integrated magnetic field bias

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.

SQUID array with non-uniform wire geometry for detecting magnetic fields over a broad operational temperature range

A superconducting electronic circuit includes at least two SQUID elements, an array of at least three Josephson Junctions, and a magnetic source element. Each SQUID element has no shared Josephson Junctions or at least one shared Josephson Junction with another SQUID element and at least one exclusive Josephson Junction. The array of at least three Josephson Junctions are connected in one, two, or three-dimensions. The magnetic source element has an electrically-tunable spatially non-uniform magnetic field.

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Chula Vista, CA, United States of America

Sergio A Montoya