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

作者：Huang, Yulin; Li, Xinyi; Bao, Jingfu^*; Zhao, Xinghai; Zheng, Yingbin; Du, Yijia; Wang, Yiling

来源：Microsystem Technologies, 2017, 23(7): 2553-2559.

DOI：10.1007/s00542-016-3054-5

• Dual-band bandpass filter
• Dual-band filter
• Fabrication process
• Parallel coupling
• Parallel-coupled
• Return loss
• Terahertz range
• Topological structure

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 x 11 mm x 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.

• 出版日期2017-7
• 单位电子科技大学; 中国工程物理研究院; 中国科学院电工研究所