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Wide-stopband bandpass-filtering power divider with high-frequency selectivity

Published online by Cambridge University Press:  07 August 2017

Kaijun Song ,
Yifang Zhou ,
Maoyu Fan ,
Yu Zhu  and
Yong Fan
Kaijun Song*
Affiliation:
EHF Key Laboratory of Science, School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China
Yifang Zhou
Affiliation:
EHF Key Laboratory of Science, School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China
Maoyu Fan
Affiliation:
EHF Key Laboratory of Science, School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China
Yu Zhu
Affiliation:
EHF Key Laboratory of Science, School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China
Yong Fan
Affiliation:
EHF Key Laboratory of Science, School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China
*
Corresponding author: K. Song Email: ksong@uestc.edu.cn
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Abstract

A wide-stopband bandpass-filtering power divider with high-frequency selectivity has been proposed in this paper. The input and output feeding lines and eight 1/4 wavelength resonators are used to realize the signal transmission. In order to obtain good frequency selectivity, source-load coupling transmission path is used to generate transmission zeros near the passband. A four-way power divider with bandpass-filtering response and high-frequency selectivity is designed, fabricated, and measured. The measured results agree with the simulated ones closely in the desirable frequency range. The measured center frequency of the power divider is 2.38 GHz with input return loss of 31.2 dB, while the measured insertion loss is about 1 dB (not including ideal 6 dB four-way power dividing insertion loss). Moreover, the measured 3-dB bandwidth is 12% and the measured stopband attenuation is >15 dB from 2.59 to 7.7 GHz. In addition, two transmission zeros of 1.9 and 2.8 GHz are located near the passband. The measured output isolations are all >15.7 dB.

Keywords

Wide-stopbandBandpass-filteringPower dividerFrequency selectivity
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 10 , December 2017 , pp. 1931 - 1936
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

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References

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