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本文基于LaAlO3衬底上用磁控溅射法制备而成的双面氧化物高温超导薄膜YBCO,设计了L波段高温超导窄带带通滤波器.该滤波器采用了改进型SIR型谐振器,具有结构紧凑、易引入内部耦合等特点,引入内部耦合后能够有效地抑制二次谐波,并且利用高温超导薄膜在微波范围内的Q值比常规导体高1～3个数量级的特点,使器件具有小型化和低插损的特点.
Based on the double-sided oxide high-temperature superconducting thin film YBCO prepared by magnetron sputtering on LaAlO3 substrate, a L-band high temperature superconducting narrowband bandpass filter is designed.The modified SIR resonator , Has the advantages of compact structure, easy introduction of internal coupling and the like, and can effectively restrain the second harmonic after the internal coupling is introduced. By utilizing the characteristic that the Q value of the high-temperature superconducting thin film in the microwave range is 1 to 3 orders of magnitude higher than the conventional conductor, The device has the characteristics of miniaturization and low insertion loss.