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A low-loss 5GHz bandpass filter using HTS coplanar waveguide quarter-wavelength resonators

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6 Author(s)
Zhewang Ma ; Dept. of Electr. & Electron. Syst., Saitama Univ., Japan ; H. Suzuki ; Y. Kobayashi ; K. Satoh
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A novel low-loss high temperature superconductor (HTS) filter is proposed by using coplanar waveguide quarter-wavelength resonators. A 4-pole Chebyshev bandpass filter with a center frequency 5.0GHz and a 0.01dB-ripple fractional bandwidth 3.2% is designed and fabricated using a YBCO film deposited on a MgO substrate. The frequency response of the filter measured at 60K agrees very well with the theoretical prediction. The measured insertion loss is 0.22dB, the lowest reported so far for HTS coplanar waveguide filters.

Published in:

Microwave Symposium Digest, 2002 IEEE MTT-S International  (Volume:3 )

Date of Conference:

2-7 June 2002