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Millimeter-Wave Ultra-Wideband Bandpass Filter Employing Dual-Mode Ring Resonators Fed by Step-Impedance Coupled Lines

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Abstract

This paper presents a novel millimeter-wave ultra-wideband (UWB) bandpass filter (BPF) based on microstrip dual-mode rectangular ring resonators. In order to get strong coupling between the input/output line and the dual-mode ring resonators, a step-impedance parallel-coupled structure is adopted for the design of the filter. On the other hand, transmission zeros are produced by the dual-mode resonator. As a consequence, the filter has low insertion-loss in its passband, sharp attenuation in its lower and upper stopbands and very wide stopbands. As an example, a filter with two dual-mode ring resonators is designed and fabricated. The measured frequency property of the fabricated filter shows good agreement with the simulated response.

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Acknowledgement

This work is supported in part by the Youth Foundation of Jiangxi Province Office of Education (GJJ09553, GJJ09554 and GJJ09286).

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Authors and Affiliations

  1. School of Electronic Science, Jiangxi University of Finance and Economics, 632 West Feng Lin Street, Nanchang, 330013, P.R.China

    Peng Cai, Yong Zhang & Bin Chen

  2. Department of Electrical and Electronic Systems, Saitama University, Saitama, 338-8570, Japan

    Zhewang Ma

  3. Nippon Pillar Packing Co., Ltd., Sanda City, Hyougo, 669 - 1333, Japan

    Hitoshi Kanzaki

Authors
  1. Peng Cai
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  2. Zhewang Ma
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  3. Hitoshi Kanzaki
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  4. Yong Zhang
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  5. Bin Chen
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Corresponding author

Correspondence to Peng Cai.

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Cai, P., Ma, Z., Kanzaki, H. et al. Millimeter-Wave Ultra-Wideband Bandpass Filter Employing Dual-Mode Ring Resonators Fed by Step-Impedance Coupled Lines. J Infrared Milli Terahz Waves 30, 432–438 (2009). https://doi.org/10.1007/s10762-009-9469-7

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  • DOI: https://doi.org/10.1007/s10762-009-9469-7

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