Qdr-Based Approach to Microwave Characterization of HIGH-TC Superconductors

A technique for HTS microwave characterization based on using quasioptical dielectric resonator (QDR) is proposed. Experimental set-up with 8mm waveband QDR has been developed. The setup operates as an integral one performing several functions. It enables measuring not only the temperature dependences of the microwave surface resistance, radiofrequency response of HTS to microwave irradiation, but also the nonlinear surface resistance. Authors discuss the scope for progress of the QDR-based technique and its new abilities.