Vol. 82

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2019-02-20

Design of a Novel Multi-Layer Wideband Bandpass Filter with a Notched Band

By Xiao-Chun Ji, Wu-Sheng Ji, Li-Ying Feng, Ying-Yun Tong, and Zhi-Yue Zhang
Progress In Electromagnetics Research Letters, Vol. 82, 9-16, 2019
doi:10.2528/PIERL18121101

Abstract

A wideband filter with a notched band is presented. The proposed filter is formed by cascading three coupling units, and each coupling unit is composed of two curved T-shaped microstrip patches at the top and bottom layers and a circular coupling slot at the mid layer. Overlapping three coupling units could result in a wideband filter with a tunable notched band. To analyse the resonance characteristics, the equivalent circuit model is presented. The notched frequency is 5.8 GHz, and within the passband, the insertion and return losses are better than -2 dB and -15 dB, respectively. The group delays are 0.08 ns and 0.12 ns correspondingly, and the upper stopband reaches 15 GHz. The multi-layer structure leads to a compact size and tight coupling characteristics, and the feasibility and excellent performance of the design is verified.

Citation


Xiao-Chun Ji, Wu-Sheng Ji, Li-Ying Feng, Ying-Yun Tong, and Zhi-Yue Zhang, "Design of a Novel Multi-Layer Wideband Bandpass Filter with a Notched Band," Progress In Electromagnetics Research Letters, Vol. 82, 9-16, 2019.
doi:10.2528/PIERL18121101
http://jpier.org/PIERL/pier.php?paper=18121101

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