Microwave circulator
AssigneeAnalog Quantum Circuits Pty Limited
InventorsThomas Michael STACE, Arkady FEDOROV
Life of this patent
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Abstract
A microwave circulator including an integrated circuit and having a number of ports, a respective superconducting ring segment coupled to each port to allow microwave frequency signals to be transferred between the port and the respective ring segment, a superconducting tunnel junction interconnecting each pair of adjacent ring segments to form a circulator ring, wherein the tunnel junctions are configured so that when a bias is applied to the tunnel junctions, signals undergo a phase shift as they traverse the tunnel junctions between ring segments, thereby propagating signals to an adjacent port in a propagation direction and at least one feature to at least partially suppress quasiparticles within the circulator.
Claims14
A microwave circulator including an integrated circuit and having:
- a) a number of ports;
- b) a respective superconducting ring segment coupled to each port to allow microwave frequency signals to be transferred between the port and the respective ring segment;
- c) a superconducting tunnel junction interconnecting each pair of adjacent ring segments to form a circulator ring, wherein the tunnel junctions are configured so that when a bias is applied to the tunnel junctions, signals undergo a phase shift as they traverse the tunnel junctions between ring segments, thereby propagating signals to an adjacent port in a propagation direction;
- and,
- d) at least one feature to at least partially suppress quasiparticles within the circulator.
Dependencies are inferred from the claim text.