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A WR-3 dual-band bandpass filter based on parallel coupling structure

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Abstract

A WR-3 dual-band bandpass filter based on micromachining fabrication process is presented in this paper. The topological structure of the dual-band filter is formed by a pair of parallel coupled single-band bandpass filter and two T-shaped matching stubs. While each single-band filter is designed by Chebyshev 6-stage inductive obstacle structures. Then the dual-band filter is fabricated and measured. The results show that the dual passbands have about 7 GHz downwards shift than the designing. The rectangle coefficient of the dual passbands is 1.33 and 1.42, respectively. The return loss of the proposed filter is better than 14 and 12 dB while the insertion loss is around 3.6 and 7.1 dB. The whole size of the fabricated filter is about 21 mm × 11 mm × 1.48 mm. It demonstrates a practical way to design, fabricate and measure the dual-band filter working in terahertz range with good rectangle coefficient.

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Authors and Affiliations

  1. School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China

    Yulin Huang, Xinyi Li, Jingfu Bao & Yiling Wang

  2. Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang, 621900, Sichuan, China

    Xinghai Zhao, Yingbin Zheng & Yijia Du

Authors
  1. Yulin Huang
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  2. Xinyi Li
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  3. Jingfu Bao
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  4. Xinghai Zhao
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  5. Yingbin Zheng
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  6. Yijia Du
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  7. Yiling Wang
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Corresponding author

Correspondence to Jingfu Bao.

Additional information

This work was supported by the NSAF Grant (Project number U1430102).

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Huang, Y., Li, X., Bao, J. et al. A WR-3 dual-band bandpass filter based on parallel coupling structure. Microsyst Technol 23, 2553–2559 (2017). https://doi.org/10.1007/s00542-016-3054-5

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  • DOI: https://doi.org/10.1007/s00542-016-3054-5

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