Intermodulation characteristics of high-power bandpass filter using dielectric rod resonators loaded in a high-Tc superconducting cylinder

A narrow-bandwidth bandpass filter with a bandwidth of 36 MHz at a center frequency of 12 GHz, is constructed by orienting a pair of TM/sub 01/spl delta//-mode dielectric rod resonators in the center of a YBCO high-Tc superconducting bulk cylinder. The high-power and intermodulation characteristics of this filter is compared with those for a similar filter structure using a Cu cylinder in place of the YBCO cylinder. This filter realizes the low-loss characteristic below 0.2 dB upto 5 W, the high power-handling capability over 10 W and the third-order intermodulation intercept of 100 dBm at 77 K.<
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