摘要
A novel double coupling planar structure(a single microstrip line coupled with two resonators coincidental)is presented for the first time.Based on this structure,a six-pole parallel-coupled high-temperature superconducting bandpass filter with both linear phase response and quasi-elliptic function response is designed.The filter has a 40 MHz passband with a center frequency of 2,000 MHz.Its dimension is18.67 mm 9 25.96 mm.At 77 K,minimum insertion loss is0.26 dB in passband.The group delay variation is\3 ns over70%of the filter bandwidth.
A novel double coupling planar structure （a single microstrip line coupled with two resonators coincidental） is presented for the first time. Based on this structure, a six-pole parallel-coupled high-temperature superconducting band-pass filter with both linear phase response and quasi-elliptic function response is designed. The filter has a 40 MHz pass-band with a center frequency of 2,000 MHz. Its dimension is 18.67 mm × 25.96 mm. At 77 K, minimum insertion loss is 0.26 dB in passband. The group delay variation is 〈3 ns over 70 % of the filter bandwidth.
