High-Temperature Superconducting Bandpass Spiral Filter
نویسندگان
چکیده
We report a new type of microstrip bandpass spiral filter structure, which exhibits much smaller size than other existing miniaturized bandpass filter structures, and is particularly useful in developing hightemperature superconducting (HTS) compact filters for cellular communication systems. A prototype three-stage HTS bandpass spiral filter with center frequency of 633 MHz was designed and fabricated on a 20 mm 8 mm 0.5 mm LaAlO3 substrate. The measurement results of the spiral filter have good agreements with its electromagnetic full-wave simulation results.
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