A Compact Three-Mode H-Shaped Resonator Bandpass Filter Having High Passband Selectivity with Four Transmission Zeros and Wide Stopband Characteristic

• OHIRA Masataka

  Saitama University

• MA Zhewang

  Saitama University

抄録

This paper proposes a compact three-mode H-shaped resonator bandpass filter fed by antiparallel coupled input/output lines. To investigate the resonant behavior of the H-shaped resonator, even/odd-mode resonance conditions of the resonator are first derived analytically. The multimode resonances of the H-shaped resonator filter are modeled by a multipath circuit formed with resonance paths. Moreover, a direct source/load coupling path is connected in parallel, of which the value shows a frequency dependency because of the antiparallel coupled feeding lines, thereby generating four transmission zeros (TZs) greater than the number of a theoretical limitation. The H-shaped resonator bandpass filter is synthesized, developed, and tested, showing a third-order passband response with four TZs located near the passband, and a wide stopband property.

収録刊行物

• IEICE Transactions on Electronics

  IEICE Transactions on Electronics E97.C (10), 957-964, 2014

  一般社団法人 電子情報通信学会

キーワード

• Bandpass filters
• multipath coupling topology
• transmission zeros
• three-mode resonators

詳細情報

• CRID: 1390001204378544128
• NII論文ID: 130004696714
• DOI: 10.1587/transele.e97.c.957
• ISSN: 17451353
• ISSN: 09168524
• Web Site: https://www.jstage.jst.go.jp/article/transele/E97.C/10/E97.C_957/_pdf
• 本文言語コード: en
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