High-temperature superconducting microwave filters for communication payloads of satellites

摘要

We have realized four-pole, quarter wave, parallel coupled, microstrip band pass filters at 4035+-40 MHz, using high-temperature superconducting thin films of YBCO on both sides of 0.5 mm thick LaAlO_3 substrates. The achieved results are close to the predicted results except for the return loss. Detailed results are presented in the paper.