Compact Wideband Bandstop Filter With Directly Controlled Rejection

Liang Liu; Xianling Liang; Haijun Fan; Ronghong Jin; Xudong Bai; Junping Geng

doi:10.1109/TCSII.2021.3049693

Compact Wideband Bandstop Filter With Directly Controlled Rejection

Liang Liu, Xianling Liang, Haijun Fan, Ronghong Jin, Xudong Bai, Junping Geng

Research output: Contribution to journal › Article › peer-review

Abstract

This brief presented a wideband bandstop filter (WBBSF) with compact size and five transmission zeros, which is based on a symmetrical three-layer ring structure comprising equivalently high-impedance phase-shift section, coupled lines, and short-stubs. The WBBSF based on multi-mode resonators can be directly synthesized from the desired rejection, and its transmission zeros and bandwidth are controlled by only two characteristic impedances. For validation, the calculations, simulations, and measurements have also been done for wideband bandstop filter. Good agreements among the calculated, simulated, and measured results are observed.

Original language	English
Journal	IEEE Transactions on Circuits and Systems II: Express Briefs
Early online date	6 Jan 2021
DOIs	https://doi.org/10.1109/TCSII.2021.3049693
Publication status	E-pub ahead of print - 6 Jan 2021

Keywords

Coupled stub-loaded resonator
Couplings
directly controlled rejection
Equivalent circuits
equivalently high-impedance phase-shift section
Filtering theory
Impedance
odd-and even-mode analysis
Resonators
Shunts (electrical)
Wideband
wideband bandstop filter.

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/TCSII.2021.3049693

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title = "Compact Wideband Bandstop Filter With Directly Controlled Rejection",

abstract = "This brief presented a wideband bandstop filter (WBBSF) with compact size and five transmission zeros, which is based on a symmetrical three-layer ring structure comprising equivalently high-impedance phase-shift section, coupled lines, and short-stubs. The WBBSF based on multi-mode resonators can be directly synthesized from the desired rejection, and its transmission zeros and bandwidth are controlled by only two characteristic impedances. For validation, the calculations, simulations, and measurements have also been done for wideband bandstop filter. Good agreements among the calculated, simulated, and measured results are observed.",

keywords = "Coupled stub-loaded resonator, Couplings, directly controlled rejection, Equivalent circuits, equivalently high-impedance phase-shift section, Filtering theory, Impedance, odd-and even-mode analysis, Resonators, Shunts (electrical), Wideband, wideband bandstop filter.",

author = "Liang Liu and Xianling Liang and Haijun Fan and Ronghong Jin and Xudong Bai and Junping Geng",

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AU - Fan, Haijun

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AU - Bai, Xudong

AU - Geng, Junping

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