Resonant-Mode Characteristics of a New Three-Mode Hybrid Microstrip/Slotline Resonator and Novel Realization of Compact Bandpass Filter with Four Transmission Zeros

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Author(s)

    • MA Zhewang
    • Graduate School of Science and Engineering, Saitama University

Abstract

This paper proposes a new three-mode resonator, which consists of a parallel-coupled microstrip line resonator embedded with a slotline resonator, and develops a compact low-loss bandpass filter (BPF) with a sharp roll-off response because of four transmission zeros (TZ) located very near the passband. Resonance mechanism and properties of the three modes are first analyzed by using an eigen-mode analysis, and then an equivalent circuit model is established for expressing a novel coupling scheme of the developed BPF. It is made clear from the results of circuit analysis that the four TZs are produced because of multiple paths between the input/output stub lines formed by the three resonant modes and the direct source/load coupling. The validity of the proposed resonator and filter is supported by the comparison between simulated and measured results.

Journal

  • IEICE Transactions on Electronics

    IEICE Transactions on Electronics 95(7), 1203-1210, 2012-07-01

    The Institute of Electronics, Information and Communication Engineers

References:  18

Cited by:  5

Codes

  • NII Article ID (NAID)
    10031023211
  • NII NACSIS-CAT ID (NCID)
    AA10826283
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    09168524
  • Data Source
    CJP  CJPref  J-STAGE 
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