Nonlinear characteristics of a superconducting receiver

Abstract

Superconducting filter technology enables highly selective and sensitive base-station receivers for wireless communications. The performance analysis of a superconducting receiver, which is inherently a nonlinear system, is simplified by introducing the concept of an effective frequency response. With this approach, superconducting filters are shown to be ideal for applications that require steep rejection at the edges of a communication band. In contrast, filter nonlinearities decrease the order of the effective frequency response of a cascaded bandpass filter, thus reducing its stop-band rejection.