Pseudoelliptic bandpass filter realized using coupled stepped-impedance resonators with tapped I/O

Jsung Ta Tsai, Cheng Liang Huang

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


A tapped combline bandpass filter composed of two coupled stepped-impedance resonators (SIRs) and with tapped lines fed in/out is modeled. The admittance matrix for the entire circuit has been derived from the four-port coupled-line impedance and admittance matrices. The obtained admittance matrix is suitable for the design of a stepped-impedance combline filter, in which the coupled-line length, as opposed to the previous work, is not restricted. The most effective miniaturization for the filter is achieved by setting the critical condition (θ1 = θ23) for the cases of K>1. Without using the cross-coupling resonator structure, the simulation result and the manipulation reveal the potential of this configuration to realize a pseudoelliptic bandpass filtering response.

Original languageEnglish
Pages (from-to)105-109
Number of pages5
JournalMicrowave and Optical Technology Letters
Issue number2
Publication statusPublished - 2000 Oct 20

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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