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Compact filtering power dividers with wide upper stopband

Published online by Cambridge University Press:  11 July 2019

Gaoya Dong ,
Weimin Wang  and
Yuanan Liu
Gaoya Dong
Affiliation:
Beijing Key Laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, P.O. Box 282, Beijing 100876, People's Republic of China
Weimin Wang*
Affiliation:
Beijing Key Laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, P.O. Box 282, Beijing 100876, People's Republic of China
Yuanan Liu
Affiliation:
Beijing Key Laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, P.O. Box 282, Beijing 100876, People's Republic of China
*
Author for correspondence: Weimin Wang, E-mail: wangwm@bupt.edu.cn
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Abstract

A series of compact filtering power dividers (FPDs) with simple layouts are proposed based on coupling topology. The structure of the presented FPD1 is composed of three resonators and one isolating resistor. These FPDs can be designed based on coupling matrix filter theory. A half-wave transmission line is employed in FPD2 to introduce a transmission zero (TZ) locating at 1.27f0. The FPD3 is designed by replacing quarter-wave transmission lines in FPD2 with quarter-wave coupled lines, which will produce a TZ locating at 1.96 f0 and extend upper stopband bandwidth. For verification, three FPDs centered at 2.45 GHz are fabricated and measured. All measured results are in good agreement with the full-wave simulation results.

Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 11 , Issue 8 , October 2019 , pp. 765 - 773
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019 

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