An electronically tuned bandstop filter using BS varactors

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  • University of Birmingham


This paper presents an investigation of a tunable bandstop filter using Barium-Strontium-Titanate (BST) varactors. 3-pole bandstop filter with varactors is fabricated on MgO substrate. It is measured at the center frequency from 8.77 to 9.26 GHz and its maximum rejection is more than 26 dB at the stop band while the insertion loss at the pass band is less than 2 dB.


Original languageEnglish
Title of host publicationProceedings of the 38th European Microwave Conference, EuMC 2008
Publication statusPublished - 1 Jan 2008