Design of dual-passband microstrip bandpass filters with suppression of higher order spurious response

Meshon Jiang*, Li Ming Chang, Albert Chin

*Corresponding author for this work

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

4 Scopus citations

Abstract

This paper proposes a systematic design method for dual-passband microstrip bandpass filters composed of stepped impedance resonators (SIRs) with suppression of higher order spurious responses. A specific dual-band fractional bandwidth design graph must be built. The line widths of the SIR and the gap size between SIRs provide two freedoms for determining the realizable fractional bandwidth of the two passbands. The inherent transmission zeros of coupled SIRs are used to suppress the unwanted spurious responses. A complete design procedure considering both the synthesis of passband responses and the suppression of spurious responses is detailed depicted in this paper. The idea is verified by a fabricated experimental filter. The measured frequency responses shows that the spurious response can be suppressed below -35.4 dB and the upper band can be extended to 5.62 f0 (13.77GHz).

Original languageEnglish
Title of host publicationAPMC 2009 - Asia Pacific Microwave Conference 2009
Pages2060-2063
Number of pages4
DOIs
StatePublished - 1 Dec 2009
EventAsia Pacific Microwave Conference 2009, APMC 2009 - Singapore, Singapore
Duration: 7 Dec 200910 Dec 2009

Publication series

NameAPMC 2009 - Asia Pacific Microwave Conference 2009

Conference

ConferenceAsia Pacific Microwave Conference 2009, APMC 2009
CountrySingapore
CitySingapore
Period7/12/0910/12/09

Keywords

  • Dual-passband
  • Spurious response
  • Stepped impedance resonator (SIR)

Fingerprint Dive into the research topics of 'Design of dual-passband microstrip bandpass filters with suppression of higher order spurious response'. Together they form a unique fingerprint.

Cite this