Abstract
A quarter-wavelength stepped impedance resonator (QWSIR) is proposed for high temperature superconducting (HTS) filter, offering wide stop-band performance. A six-pole P-band HTS filter with QWSIRs was designed and fabricated. The filter has a fractional bandwidth of 0.8% at 516MHz and shows the lowest spurious frequency at about 2.15GHz. The measured results of the HTS filter are in good agreement with simulations.
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