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2013-05-17
Compact Interdigital Capacitor Coupled Dual-Behavior Resonator (Icdbr) Filter with Suppression of Spurious Responses
By
Progress In Electromagnetics Research C, Vol. 40, 25-35, 2013
Abstract
A compact interdigital capacitor coupled dual-behavior resonator (DBR) filter with high spurious responses suppression is proposed in this paper. The technique is based on two equivalent topologies of J-inverter and dual-line equivalent circuit of open-circuited stubs. The first compact equivalent topology capacitive inverter is a high pass structure, and consequently, the spurious responses can be suppressed effectively at low frequencies. The second equivalent topology π-network is employed in realizing a compact size and adding new transmission zeros dedicated to the spurious responses suppression at high frequencies. Further compactness is achieved with a dual-line equivalent circuit of open-circuited stubs. The relevant equations are given in the paper. Finally, a 3rd-order compact DBR filter is designed and measured. This structure has a high degree of miniaturization(83%) in comparison to the classical one. Measurement results show good agreement with the simulated ones.
Citation
Sheng-Jie Wang, Tao Su, Li-Juan Zhang, Zhi-Peng Li, and Yong-Liang Zhang, "Compact Interdigital Capacitor Coupled Dual-Behavior Resonator (Icdbr) Filter with Suppression of Spurious Responses," Progress In Electromagnetics Research C, Vol. 40, 25-35, 2013.
doi:10.2528/PIERC13041008
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