High-selectivity dual-band filtering power divider using stub-loaded quarter-wavelength resonator

Xiao-Lan Zhao, Li Gao, Jin-Xu Xu, Yao Zhang and Jun Xiang

Journal of Electromagnetic Waves and Applications, 2015, vol. 29, issue 16, 2216-2223

Abstract: This article presents a novel structure to design miniaturized dual-band filtering power dividers. It is realized by combining the feeding lines and coupled stub-loaded quarter-wavelength resonators. The operating frequencies can be adjusted easily by controlling the stub length of the resonator. Source–load coupling is employed to generate transmission zeros to enhance the selectivity. A resistor is added to guarantee the isolation and port matching. For demonstration, a dual-band filtering power divider is implemented. Good agreement between the prediction and measurement validates the proposed method.

Date: 2015
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DOI: 10.1080/09205071.2015.1088405

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