A Fully Canonical Bandpass Filter Design Using Microstrip Transversal Resonator Array Configuration

• OHIRA Masataka

  Graduate School of Science and Engineering, Saitama University

• KATO Toshiki

  Graduate School of Science and Engineering, Saitama University

• MA Zhewang

  Graduate School of Science and Engineering, Saitama University

Abstract

This paper proposes a new and simple microstrip bandpass filter structure for the design of a fully canonical transversal array filter. The filter is constructed by the parallel arrangement of microstrip even- and odd-mode half-wavelength resonators. In this filter, transmission zeros (TZs) are not produced by cross couplings used in conventional filter designs, but by an intrinsic negative coupling of the odd-mode resonators having open ends with respect to the even-mode resonators with shorted ends. Thus, the control of the resonant frequency and the external Q factor of each resonator makes it possible to form both a specified passband and TZs. As an example, a fully canonical bandpass filter with 2-GHz center frequency, 6% bandwidth, and four TZs is synthesized with a coupling-matrix optimization, and its structural parameters are designed. The designed filter achieves a rapid roll-off and low-loss passband response, which can be confirmed numerically and experimentally.

Journal

• IEICE Transactions on Electronics

  IEICE Transactions on Electronics E99.C (10), 1122-1129, 2016

  The Institute of Electronics, Information and Communication Engineers

Keywords

• bandpass filters
• transversal array filters
• even mode
• odd mode
• transmission zeros

Details

• CRID: 1390001204379932160
• NII Article ID: 130005598142
• DOI: 10.1587/transele.e99.c.1122
• ISSN: 17451353
• ISSN: 09168524
• Web Site: https://www.jstage.jst.go.jp/article/transele/E99.C/10/E99.C_1122/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed