Josephson-Junction driven submillimeter wave microstrip resonator

A microstrip resonator driven by a resistively shunted Josephson junction has been used for submillimeter-wave surface resistance measurements to about 400 GHz. A simple, analytical analysis of the resonator-induced structure in the junction's I-V characteristic gives the resonator surface resistance in the range of 2-160 m Omega with an accuracy of better than 30%.<
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