A compact bandpass filter with enhanced stopband characteristics by an asymmetric cross-shape defected ground structure

Han Jan Chen; Tsung Hui Huang; Chin Sheng Chang; Lih Shan Chen; Jui Hong Horng; Yeong Her Wang; Mau Phon Houng

doi:10.1109/TUFFC.2006.158

A compact bandpass filter with enhanced stopband characteristics by an asymmetric cross-shape defected ground structure

Han Jan Chen, Tsung Hui Huang, Chin Sheng Chang, Lih Shan Chen, Jui Hong Horng, Yeong Her Wang, Mau Phon Houng

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

6 Citations (Scopus)

Abstract

In this paper, we present an effective technique to enhance stopband bandwidth for a bandpass filter by using an asymmetric, cross-shape defected ground structure (CSDGS). A single CSDGS can provide a higher attenuation rate near passband and broader stopband bandwidth. Moreover, with the asymmetric CSDGS, two different resonant frequencies can be excited and controlled independently, resulting in synthesizing a passband. The synthesized bandpass filter can be modeled by parallel LC resonant circuits in connection with T-networks. The bandwidth and insertion loss of this bandpass filter at 4.2 GHz is 28.6% and -1.44 dB, respectively, and 20 dB rejection in the stopband is up to four times the central frequency. All the synthesized bandpass filters have been measured and are in good agreement with simulated results.

Original language	English
Pages (from-to)	2183-2187
Number of pages	5
Journal	IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume	53
Issue number	11
DOIs	https://doi.org/10.1109/TUFFC.2006.158
Publication status	Published - 2006 Nov

All Science Journal Classification (ASJC) codes

Instrumentation
Acoustics and Ultrasonics
Electrical and Electronic Engineering

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10.1109/TUFFC.2006.158

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title = "A compact bandpass filter with enhanced stopband characteristics by an asymmetric cross-shape defected ground structure",

abstract = "In this paper, we present an effective technique to enhance stopband bandwidth for a bandpass filter by using an asymmetric, cross-shape defected ground structure (CSDGS). A single CSDGS can provide a higher attenuation rate near passband and broader stopband bandwidth. Moreover, with the asymmetric CSDGS, two different resonant frequencies can be excited and controlled independently, resulting in synthesizing a passband. The synthesized bandpass filter can be modeled by parallel LC resonant circuits in connection with T-networks. The bandwidth and insertion loss of this bandpass filter at 4.2 GHz is 28.6% and -1.44 dB, respectively, and 20 dB rejection in the stopband is up to four times the central frequency. All the synthesized bandpass filters have been measured and are in good agreement with simulated results.",

author = "Chen, {Han Jan} and Huang, {Tsung Hui} and Chang, {Chin Sheng} and Chen, {Lih Shan} and Horng, {Jui Hong} and Wang, {Yeong Her} and Houng, {Mau Phon}",

note = "Funding Information: The financial support of this study by the National Science Council of the Republic of China under Grant NSC-93-2215-E-006-006 and NSC-93-2215-E-006-033 is greatly appreciated.",

year = "2006",

month = nov,

doi = "10.1109/TUFFC.2006.158",

language = "English",

volume = "53",

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T1 - A compact bandpass filter with enhanced stopband characteristics by an asymmetric cross-shape defected ground structure

AU - Chen, Han Jan

AU - Huang, Tsung Hui

AU - Chang, Chin Sheng

AU - Chen, Lih Shan

AU - Horng, Jui Hong

AU - Wang, Yeong Her

AU - Houng, Mau Phon

N1 - Funding Information: The financial support of this study by the National Science Council of the Republic of China under Grant NSC-93-2215-E-006-006 and NSC-93-2215-E-006-033 is greatly appreciated.

PY - 2006/11

Y1 - 2006/11

N2 - In this paper, we present an effective technique to enhance stopband bandwidth for a bandpass filter by using an asymmetric, cross-shape defected ground structure (CSDGS). A single CSDGS can provide a higher attenuation rate near passband and broader stopband bandwidth. Moreover, with the asymmetric CSDGS, two different resonant frequencies can be excited and controlled independently, resulting in synthesizing a passband. The synthesized bandpass filter can be modeled by parallel LC resonant circuits in connection with T-networks. The bandwidth and insertion loss of this bandpass filter at 4.2 GHz is 28.6% and -1.44 dB, respectively, and 20 dB rejection in the stopband is up to four times the central frequency. All the synthesized bandpass filters have been measured and are in good agreement with simulated results.

AB - In this paper, we present an effective technique to enhance stopband bandwidth for a bandpass filter by using an asymmetric, cross-shape defected ground structure (CSDGS). A single CSDGS can provide a higher attenuation rate near passband and broader stopband bandwidth. Moreover, with the asymmetric CSDGS, two different resonant frequencies can be excited and controlled independently, resulting in synthesizing a passband. The synthesized bandpass filter can be modeled by parallel LC resonant circuits in connection with T-networks. The bandwidth and insertion loss of this bandpass filter at 4.2 GHz is 28.6% and -1.44 dB, respectively, and 20 dB rejection in the stopband is up to four times the central frequency. All the synthesized bandpass filters have been measured and are in good agreement with simulated results.

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A compact bandpass filter with enhanced stopband characteristics by an asymmetric cross-shape defected ground structure

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All Science Journal Classification (ASJC) codes

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