Lead-strontium-titanate varactor-tuned CPW bandstop filter on liquid crystal polymer substrates

Young Hoon Chun, Roman Keller, Jia-Sheng Hong, Charalampos Fragkiadakis, Robert V. Wright, Paul B. Kirby

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


This paper presents an investigation of a tunable coplanar waveguide (CPW) bandstop filter with slotted ground structure. Spurious responses resulting from the shapes of resonator and the tuning position have been investigated by EM simulations. As a tuning element, Lead- Strontium- Titanate (PST) varactor chip is deployed. Also, in order to reduce required elements and unwanted spurious, LCP substrates are used as multi-layered laminates. A 2-pole tunable bandstop filter of this type is measured at the center frequency from 905 to 1040 MHz and its maximum rejection is more than 25 dB at the stopband with a wide passband response.
Original languageEnglish
Title of host publication2009 European Microwave Conference (EuMC)
Number of pages4
ISBN (Print)9781424447480
Publication statusPublished - 30 Oct 2009
Event39th European Microwave Conference 2009 - Rome, Italy
Duration: 28 Sept 20092 Oct 2009
Conference number: EuMC 2009


Conference39th European Microwave Conference 2009


Dive into the research topics of 'Lead-strontium-titanate varactor-tuned CPW bandstop filter on liquid crystal polymer substrates'. Together they form a unique fingerprint.

Cite this