Superconducting tunable resonator with wide tuning range utilizing radio frequency superconducting quantum interference devices and multi-stacked capacitor

Abstract

The technology described herein is directed towards a tunable superconducting resonator with a relatively wide tuning range based on radio-frequency superconducting quantum interference devices (rf-SQUIDs). In one example implementation, the technology includes a multi-stacked capacitor, facilitating a large value capacitor using multi-layer superconducting thin films for an ultra-compact footprint. In one example design, a group of rf-SQUIDs are aligned between a transmission line/inductor in the resonator and a control line. When a small current is applied to the control line, the rf-SQUIDs' inductance, and consequently the resonator's total inductance, varies, whereby tuning the inductance is equivalent to tuning the resonant frequency for the resonator. In this way, a wideband tuning mechanism in a superconducting resonator is achieved using a relatively small, practical number of rf-SQUIDs and a straightforward application of controlled direct current. Also described are E-H shielding poles that help shield excess magnetic flux from nearby components.

Dependencies are inferred from the claim text.