Balanced-to-balanced power divider with tunable in-phase/out-of-phase power-dividing ratio

Pei-Ling Chi, Chun Pin Chien

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

6 Scopus citations


This paper presents a balanced-to-balanced microstrip power divider with a wide range of continuously tunable power-dividing ratios for either in-phase or out-of-phase outputs. Based on simple design equations, the proposed power divider can theoretically attain ideal mixed-mode responses, including the in-phase and out-of-phase designs, for an arbitrary power ratio by a proper control of the used varactor capacitances. A single-layer power divider was prototyped and measured. Given the differential-mode return loss and output isolation greater than 15 dB, the power-dividing ratio was tuned from 11.1 dB to 24.2 dB and from 1.3 dB to 21.1 dB for the in-phase and out-of-phase outputs, respectively. For all states, the common-mode suppression achieved greater than 63.9 dB at the center frequency.

Original languageEnglish
Title of host publication2018 Asia-Pacific Microwave Conference, APMC 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages3
ISBN (Electronic)9784902339451
StatePublished - 16 Jan 2019
Event30th Asia-Pacific Microwave Conference, APMC 2018 - Kyoto, Japan
Duration: 6 Nov 20189 Nov 2018

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC


Conference30th Asia-Pacific Microwave Conference, APMC 2018


  • Balanced-to-balanced
  • Differential
  • In-phase
  • Out-of-phase
  • Power divider
  • Power-dividing ratio
  • Tunable


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