DC isolated directional coupler

Pavel Turalchuk, Irina Munina, Irina Vendik, Jia Ni, Jiasheng Hong

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


Novel designs of directional couplers with input and output isolation for microwave circuits are proposed. The low-loss directional coupler on coupled lines designed with implementation of multilayer liquid crystal polymer (LCP) technology is considered as a component of phase shifters. Using thin layers of LCP circuit material makes it possible to realize a periodical capacitive loading of coupled lines in order to obtain dc isolation between input and outputs, which allows significant simplifying the biasing circuitry of phase shifters and as a result reducing overall size. In line with the experimental results of the coupled line structure the insertion loss does not exceed 0.1 dB in operational frequency band 2.7-3.2 GHz.

Original languageEnglish
Title of host publicationEuropean Microwave Week 2014: Connecting the Future, EuMW 2014 - Conference Proceedings; EuMC 2014: 44th European Microwave Conference
Number of pages3
ISBN (Print)9782874870354
Publication statusPublished - 15 Dec 2014
Event2014 44th European Microwave Conference - Rome, Italy
Duration: 6 Oct 20149 Oct 2014


Conference2014 44th European Microwave Conference
Abbreviated titleEuMC 2014
OtherHeld as Part of the 17th European Microwave Week, EuMW 2014


  • coupled lines
  • directional coupler
  • liquid crystal polymer (LCP)
  • multilayer technology

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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