Wideband Bandstop Filter With Extreme Sharp Skirt Selectivity

Kong, Mengdan; Wu, Yongle; Zhuang, Zheng; Liu, Yuanan

doi:10.1109/lmwc.2018.2874130

Cited by 29 publications

(10 citation statements)

References 8 publications

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“…As the proposed algorithm can design the positions of TZs and RZs, upper and lower ARs could even reach 945.8 and 608.0 dB/GHz, respectively. Therefore, sharp‐rejection performance can be much better than the former works [32–55].…”

Section: Methodsmentioning

confidence: 99%

“…There are mainly three approaches to realize wideband BSFs [32–55]. Coupled line structures are used not only for circuit miniaturization but also to create extra transmission zeros (TZs) for BSF design [32–41]. The signal interference technique is the other approach to create TZs by utilizing two signal electrical paths, which leads to wideband bandstop response [42–48].…”

Section: Introductionmentioning

confidence: 99%

“…With the rapid development of modern communication systems, BSFs with wide bandwidths and sharp‐rejection performance have become a highlight. There are mainly three approaches to realize wideband BSFs [32–55]. Coupled line structures are used not only for circuit miniaturization but also to create extra transmission zeros (TZs) for BSF design [32–41].…”

Section: Introductionmentioning

confidence: 99%

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Analysis and design of a sharp‐rejection wideband bandstop filter with multi‐transmission zeros and reflection zeros

Chen

Wang

2021

IET Microwaves Antenna & Prop

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Analysis and design of a wideband bandstop filter with multi-transmission zeros (TZs) and reflection zeros (RZs) are presented. The proposed topology consists of N-1 shunt open-circuited stubs (OCSs) cascaded through N-sections of transmission lines, and two M-sections of OCSs are shunted at two output ports, respectively. After complicated mathematical analysis, the numbers of TZs and RZs are determined by section numbers M and N. By using the proposed algorithm, equal ripples with controllable ripple levels can be realized in the passband. Although the ripples in the stopband have different levels, each ripple level can be designed independently. As the proposed algorithm can design the positions of TZs and RZs, upper and lower attenuation rates can be increased dramatically. Therefore, compared with former works, the proposed work provides enhanced sharp-rejection and simultaneously maintains wide stopband performance. For verification, two experimental circuits are fabricated, and the proposed design theory and algorithm are well verified by the measured frequency response.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis and design of a sharp‐rejection wideband bandstop filter with multi‐transmission zeros and reflection zeros

Chen

Wang

2021

IET Microwaves Antenna & Prop

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“…One approach is to use signal interference and cross-coupling to design a wideband Band Stop Filter (BSF) 1 . In another one, a wideband BSF is designed using two λ 4 open and circuited transmission couple lines 2 . The proposed filter shows optimal electrical performance.…”

Section: Introductionmentioning

confidence: 99%

Design of a highly selective bandstop filter using dual path capacitive coupled SIR structure

Younis

Rehman

Khalid

2022

Preprint

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This article presents the design of a wideband bandstop filter (BSF) with the ultimate goal of improving selectivity. The designedfilter is consists of a dual-path Capacitive Coupled Step Impedance Resonator (DP-CCSIR). A theoretical analysis of theproposed DP-CCSIR structure has been presented in this paper. It has been observed that the selectivity can be improved byincreasing the order of the dual coupled step impedance resonator. The proposed design produces a wideband BSF centeredat 5.25 GHz with fractional bandwidth of 58.5%. The results have demonstrated that the resonant frequencies are regulatedby varying the electrical length of CCSIR. Moreover, it has also been realized that dual-path CCSIR is involved in producingthe finite frequency transmission poles, hence leading to better selectivity. However, the proposed design has been validatedthrough the fabrication of three prototypes. The measurement shows good concurrence with the simulated results.

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“…To generate more in‐band poles, two‐section anti‐coupling lines [15] or multiple quarter‐wavelength resonators [16] were studied for bandstop filters with enhanced selectivity and stopband rejection. Also, the hybrid structures of grounded resistors, branch line, and coupling lines were introduced to obtain wideband absorptive response [17, 18].…”

Section: Introductionmentioning

confidence: 99%

Wideband bandstop filters based on wideband 180° phase shifters

Qiu

2020

IET Microwaves, Antennas & Propagation

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Wideband Bandstop Filter With Extreme Sharp Skirt Selectivity

Cited by 29 publications

References 8 publications

Analysis and design of a sharp‐rejection wideband bandstop filter with multi‐transmission zeros and reflection zeros

Analysis and design of a sharp‐rejection wideband bandstop filter with multi‐transmission zeros and reflection zeros

Design of a highly selective bandstop filter using dual path capacitive coupled SIR structure

Wideband bandstop filters based on wideband 180° phase shifters

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