Narrowband Barium Strontium Titanate (BST) tunable bandpass filters at X-band

Zhiping Feng, Wael M. Fathelbab, Peter G. Lam, Vrinda Haridasan, Jon-Paul Maria, Angus I. Kingon, Michael B. Steer

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

6 Scopus citations

Abstract

A 3rd-order combline tunable filter with very narrow bandwidth at X-band is implemented utilizing ferroelectric Barium Strontium Titanate (BST) interdigitated varactors. The filter and its varactors are integrated on a ceramic substrate together with a simple resistive biasing circuit. Upon the application of a bias voltage ranging from 0 to 90 V the passband of the filter tuned from 8.127 to 9.973 GHz while maintaining a fractional bandwidth of approximately 4.8-5.9 %. Over the tuning band the passband insertion loss varied from 10.7 dB to 7.5 dB while the return loss was better than 15 dB. The tuning ratio is 23 %.

Original languageEnglish (US)
Title of host publicationIMS 2009 - 2009 IEEE MTT-S International Microwave Symposium Digest
Pages1061-1064
Number of pages4
DOIs
StatePublished - Dec 1 2009
Event2009 IEEE MTT-S International Microwave Symposium, IMS 2009 - Boston, MA, United States
Duration: Jun 7 2009Jun 12 2009

Other

Other2009 IEEE MTT-S International Microwave Symposium, IMS 2009
CountryUnited States
CityBoston, MA
Period6/7/096/12/09

All Science Journal Classification (ASJC) codes

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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    Feng, Z., Fathelbab, W. M., Lam, P. G., Haridasan, V., Maria, J-P., Kingon, A. I., & Steer, M. B. (2009). Narrowband Barium Strontium Titanate (BST) tunable bandpass filters at X-band. In IMS 2009 - 2009 IEEE MTT-S International Microwave Symposium Digest (pp. 1061-1064). [5165883] https://doi.org/10.1109/MWSYM.2009.5165883