Tunable, substrate integrated, high Q filter cascade for high isolation

Eric J. Naglich, Juseop Lee, Dimitrios Peroulis, William J. Chappell

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

14 Citations (Scopus)

Abstract

A combination of tunable bandpass/bandstop filter substrate integrated cavity filters is shown for high spectral isolation. Greater than 90 dB of isolation is shown, which is potentially useful for isolating small signals in the presence of large interferers. Both filters are created using the same substrate integrated evanescent-mode cavity resonators which are placed in series or in shunt by changing the cavity feeds. The resonators are tuned using deformation of a copper membrane induced by a piezo electric actuator. The bandstop filter is able to place deep nulls on the skirt of the bandpass filter function on both the high and low frequency sides. The notch can be tuned from 2.1% to 9.6% away from the center frequency of the bandpass filter. The bandstop filter is also designed with a tunable shape which allows for wider bandwidth isolation on demand.

Original languageEnglish
Title of host publication2010 IEEE MTT-S International Microwave Symposium, MTT 2010
Pages1468-1471
Number of pages4
DOIs
Publication statusPublished - 2010
Event2010 IEEE MTT-S International Microwave Symposium, MTT 2010 - Anaheim, CA, United States
Duration: 2010 May 232010 May 28

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
ISSN (Print)0149-645X

Other

Other2010 IEEE MTT-S International Microwave Symposium, MTT 2010
CountryUnited States
CityAnaheim, CA
Period10/5/2310/5/28

Keywords

  • Bandpass filters
  • Bandstop filters
  • Cascade circuits
  • Cavity resonators
  • Piezoelectric transducers
  • Tunable filters

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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  • Cite this

    Naglich, E. J., Lee, J., Peroulis, D., & Chappell, W. J. (2010). Tunable, substrate integrated, high Q filter cascade for high isolation. In 2010 IEEE MTT-S International Microwave Symposium, MTT 2010 (pp. 1468-1471). [5517351] (IEEE MTT-S International Microwave Symposium Digest). https://doi.org/10.1109/MWSYM.2010.5517351