2010•IEEE Transactions on Applied SuperconductivityRequires access

Realization of a Highly Miniaturized Wideband Bandpass Filter at the UHF Band

Sormeh Setoodeh, Paul D. Laforge, Raafat R. Mansour

Abstract

A niobium-based low temperature superconducting 7-pole bandpass filter with a wide bandwidth at the UHF band is designed and tested. The filter has a relative bandwidth of 80% and is extremely miniaturized with a total dimension of less than 3 mm × 1 mm. The filter topology is that of the bandpass transformed lowpass prototype filter with alternating shunt and series resonators. The filter has a wide spurious free stopband up to 4 GHz. The measured results are in very good agreement with theoretical design predictions.

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Key concepts: Band-pass filter, Electronic filter topology, Stopband, Prototype filter, m-derived filter, Distributed element filter, High-pass filter, Bandwidth (computing)