TY - JOUR
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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U2 - 10.1109/TUFFC.2006.158
DO - 10.1109/TUFFC.2006.158
M3 - Article
C2 - 17091853
AN - SCOPUS:33846254495
SN - 0885-3010
VL - 53
SP - 2183
EP - 2187
JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
IS - 11
ER -