Novel fractal DGSs for Band-gap filter with improved Q-factor

Yan Yun Gong; Ling Wang; Kun Wei; Zhao Lin Zhang

doi:10.13164/re.2017.0992

Novel fractal DGSs for Band-gap filter with improved Q-factor

Yan Yun Gong, Ling Wang, Kun Wei, Zhao Lin Zhang

School of Electronics and Information

Northwestern Polytechnical University Xian

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

3 Scopus citations

Abstract

This paper presents a novel fractal defected ground structure (FDGS) for designing high Q-factor band-gap filter. Key parameters of the proposed FDGS are studied. The decreased slot distance causes rapid increase in the filter Q-factor. The designed second iterative FDGS provides the band-gap property at 1.662 GHz with 3-dB bandwidth of 10.8 MHz and Q-factor 69.25. The rejection level of the second iterative FDGS is greater than 40 dB. The third iterative FDGS has smaller dimension than that of the second iterative FDGS. Moreover, the third iterative FDGS has two resonant frequencies with suppression levels of 33 dB and 26 dB. The Q-factors of the resonant frequencies are 24.22 and 27.36 respectively.

Original language	English
Pages (from-to)	992-998
Number of pages	7
Journal	Radioengineering
Volume	26
Issue number	4
DOIs	https://doi.org/10.13164/re.2017.0992
State	Published - 1 Dec 2017

Keywords

Band-gap filter
Defected ground structure
Fractal structure
High Q-factor

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title = "Novel fractal DGSs for Band-gap filter with improved Q-factor",

abstract = "This paper presents a novel fractal defected ground structure (FDGS) for designing high Q-factor band-gap filter. Key parameters of the proposed FDGS are studied. The decreased slot distance causes rapid increase in the filter Q-factor. The designed second iterative FDGS provides the band-gap property at 1.662 GHz with 3-dB bandwidth of 10.8 MHz and Q-factor 69.25. The rejection level of the second iterative FDGS is greater than 40 dB. The third iterative FDGS has smaller dimension than that of the second iterative FDGS. Moreover, the third iterative FDGS has two resonant frequencies with suppression levels of 33 dB and 26 dB. The Q-factors of the resonant frequencies are 24.22 and 27.36 respectively.",

keywords = "Band-gap filter, Defected ground structure, Fractal structure, High Q-factor",

author = "Gong, {Yan Yun} and Ling Wang and Kun Wei and Zhang, {Zhao Lin}",

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AU - Gong, Yan Yun

AU - Wang, Ling

AU - Wei, Kun

AU - Zhang, Zhao Lin

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Y1 - 2017/12/1

N2 - This paper presents a novel fractal defected ground structure (FDGS) for designing high Q-factor band-gap filter. Key parameters of the proposed FDGS are studied. The decreased slot distance causes rapid increase in the filter Q-factor. The designed second iterative FDGS provides the band-gap property at 1.662 GHz with 3-dB bandwidth of 10.8 MHz and Q-factor 69.25. The rejection level of the second iterative FDGS is greater than 40 dB. The third iterative FDGS has smaller dimension than that of the second iterative FDGS. Moreover, the third iterative FDGS has two resonant frequencies with suppression levels of 33 dB and 26 dB. The Q-factors of the resonant frequencies are 24.22 and 27.36 respectively.

AB - This paper presents a novel fractal defected ground structure (FDGS) for designing high Q-factor band-gap filter. Key parameters of the proposed FDGS are studied. The decreased slot distance causes rapid increase in the filter Q-factor. The designed second iterative FDGS provides the band-gap property at 1.662 GHz with 3-dB bandwidth of 10.8 MHz and Q-factor 69.25. The rejection level of the second iterative FDGS is greater than 40 dB. The third iterative FDGS has smaller dimension than that of the second iterative FDGS. Moreover, the third iterative FDGS has two resonant frequencies with suppression levels of 33 dB and 26 dB. The Q-factors of the resonant frequencies are 24.22 and 27.36 respectively.

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KW - Defected ground structure

KW - Fractal structure

KW - High Q-factor

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Novel fractal DGSs for Band-gap filter with improved Q-factor

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