Full 2-Port Calibrated S-Parameter Measurements up to 30 W of High-Temperature Superconducting Filters

We have configured, tested and qualified a high-power network analyzer that can deliver between 100 pW and 30 W to a DUT. This system can be readily switched between low-power and high-power levels, output power leveled and fully calibrated over its full power range. This calibrated instrument was used to measure the performance of high-power high-temperature superconducting (HTS) filters. The performance of these prototype filters measured at an operating power of 8 W was: <0.02 dB in-band insertion loss, 0.2 dB in-band ripple, >17 dB in-band return loss and >50 dB off-band rejection.