A π-type Isolation Network for Improvement of Matching and Isolation in Reconfigurable Multifunctional Bandpass Filter

Xu Zhu, Tao Yang, Pei Ling Chi, Ruimin Xu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, a method for improving the output impedance match and isolation between output ports of the reconfigurable single-to-balanced (SE-BAL), power-dividing (PD) and single-ended (SE) multifunctional filter is presented. By adding the varactor-tuned π-type isolation network to the outputs of the tunable multifunctional filter, both the matching and isolation at the output ports are improved to a large degree over the full tuning range. Compared to the original standalone multifunctional filter, the measured output return loss and isolation of the filter with π-type isolation network are improved by more than 10 dB at center frequency of each tuning state under the SE-BAL and PD filtering mode, while the measured output return loss and isolation for the SE filtering mode still keeps better than -20 dB in the whole tuning range.

Original languageEnglish
Title of host publication2019 49th European Microwave Conference, EuMC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages125-128
Number of pages4
ISBN (Electronic)9782874870552
DOIs
StatePublished - Oct 2019
Event49th European Microwave Conference, EuMC 2019 - Paris, France
Duration: 1 Oct 20193 Oct 2019

Publication series

Name2019 49th European Microwave Conference, EuMC 2019

Conference

Conference49th European Microwave Conference, EuMC 2019
CountryFrance
CityParis
Period1/10/193/10/19

Keywords

  • filtering power divider
  • isolation network
  • reconfigurable filter
  • single-ended filter
  • single-to-balanced filter

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