W-Band E-Plane Waveguide Bandpass Filter Based on Meander Ring Resonator

• Published in: IEEE Microwave and Wireless Components Letters Vol. 31; no. 12; pp. 1267 - 1270
• Main Authors: Xu, Kai-Da, Xia, Shengpei, Guo, Ying-Jiang, Cui, Jianlei, Zhang, Anxue, Chen, Qiang
• Format: Journal Article
• Language: English; Japanese
• Published: IEEE 01.12.2021; Institute of Electrical and Electronics Engineers (IEEE)
• Subjects: <italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">W -band; Band-pass filters; Bandpass filter (BPF); Frequency measurement; Integrated circuit modeling; meander ring resonators (MRRs); Metals; Resonator filters; Resonators; Substrates; waveguide filter
• ISSN: 1531-1309; 1558-1764
• DOI: 10.1109/LMWC.2021.3103638

A <inline-formula> <tex-math notation="LaTeX">W </tex-math></inline-formula>-band <inline-formula> <tex-math notation="LaTeX">E </tex-math></inline-formula>-plane waveguide bandpass filter (BPF) is proposed using an embedded substrate with two metal strips and a meander ring resonator. The center frequency, bandwidth, and skirt selectivity of the proposed BPF can be easily adjusted. A simplified LC equivalent circuit is given to understand the operational mechanism of the BPF structure and investigate the distributions of the transmission zeros and poles. To validate the idea and show the performance of the designed <inline-formula> <tex-math notation="LaTeX">W </tex-math></inline-formula>-band BPF, a prototype example is manufactured and measured. The measurement results show that the waveguide BPF has a center frequency at 91.3 GHz with a bandwidth from 88.9 to 93.7 GHz, and the minimum insertion loss within the passband is 1.6 dB.