Nonlinear analysis of disk resonators. Application to material characterization and filter design.

A procedure for the numerical prediction of the microwave nonlinear behavio r (intermodulation products, degradation of quality factors, etc.) of TM010 disk resonators has been developed. The procedure is based on relating a v ery general description of HTS nonlinearities with the circuit elements of a nonlinear radial transmission line. This radial transmission line is then analyzed using the Harmonic Balance algorithm. Successful cross-checks are performed by comparing simulations with theoretical results obtained for a specific model of HTS nonlinearity. The application of this procedure to t he determination of nonlinear material parameters from disk resonator measu rements is illustrated, as well as its use for simulating filters with seve ral inter-coupled disks.