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

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.

Keywords:

• dual-band
• power divider
• filtering responses
• high selectivity

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work is supported by the Natural Science Foundation of Guangdong Province under [grant number 1414050001088], the open program from State Key Laboratory of Millimeter Waves under [grant number K201612], and Collaborative Innovation Project of Shenzhen under [grant number GJHS20120702140546200].