Patent ID: 11955934
Assignee: SEEQC, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 16:
17. A method of amplifying a broadband microwave input signal, comprising:
an amplifying transmission line comprising a series of nonlinear tunable superconducting inductors and associated shunt capacitors, each nonlinear tunable superconducting inductor having tunable nonlinear properties responsive to a control signal, comprising a symmetric rf-SQUID comprising two identical shunted rf-SQUIDs with two coupling loops, each rf-SQUID comprising at least one Josephson junction;
presenting as an input to the amplifying transmission line a combination of an input microwave signal and a microwave pump signal outside a bandwidth of the input microwave signal;
measuring an output of the amplifying transmission line for at least nonlinear distortion; and
distinctly controlling tuning of a plurality of nonlinearities of different orders of the series of nonlinear tunable superconducting inductors using the control signals dependent on at least the measured nonlinear distortion.