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2011-11-30
Dual-Band Bandpass Filter with Controllable Characteristics Using Stub-Loaded Resonators
By
Fu-Chang Chen,

    Dr. Fu-Chang Chen

    School of Electronic and Information Engineering

    South China University of Technology

    China

    Homepage

Jie Ming Qiu

    Dr. Jie Ming Qiu

    School of Electronic and Information Engineering

    South China University of Technology

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 28, 45-51, 2012
doi:10.2528/PIERL11100904 | Google Scholar

Abstract
A compact microstrip-line dual-band bandpass filter with controllable characteristics is presented using a stub-loaded resonator. The resonator is formed by loading one open circuit terminated stub in shunt to a simple uniform impedance line. The passband frequencies of the dual-band filter can be conveniently controlled by tuning the lengths of stub-loaded resonators. The bandwidth of the first passband can be controlled by tuning the parameters of center stub-loaded resonator, and the bandwidth of the second passband is determined by the coupling between the sideward stub-loaded resonators. To illustrate the concept, a second-order dual-band filter is designed, fabricated and measured. Simulated and measured results are found in good agreement with each other.
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Citation
Fu-Chang Chen, and Jie Ming Qiu, "Dual-Band Bandpass Filter with Controllable Characteristics Using Stub-Loaded Resonators," Progress In Electromagnetics Research Letters, Vol. 28, 45-51, 2012.
doi:10.2528/PIERL11100904
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