Automatic Trimming Technique for Superconducting Band-Pass Filters Using a Trimming Library

Shigetoshi OHSHIMA; Takuro KANEKO; Jae-Hun LEE; Maya OSAKA; Satoshi ONO; Atsushi SAITO

doi:10.1587/transele.E92.C.302

Special Section on Recent Progress in Superconducting Analog Devices and Their Applications

Automatic Trimming Technique for Superconducting Band-Pass Filters Using a Trimming Library

Shigetoshi OHSHIMA, Takuro KANEKO, Jae-Hun LEE, Maya OSAKA, Satoshi ONO, Atsushi SAITO

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Keywords: HTS band-pass filter, automatic tuning, trimming library microwave device

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2009 Volume E92.C Issue 3 Pages 302-306

DOI https://doi.org/10.1587/transele.E92.C.302

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Abstract

The superconducting band-pass filter has small insertion loss and excellent out-of-band rejection properties. It has been put to practical use in a number of applications. However, in order to expand its range of application, a tuning technique that can restore the filter characteristics is needed. We propose an automatic tuning system using a trimming library and checked the feasibility of the system by tuning a forward-coupled filter with three resonators. The results show that the trimming library method is an effective way of automatically improving the filter characteristics.

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