Vialess composite right/left-handed stripline and its applications for broadband 3-dB and tunable couplers

Jun H. Choi, Chung Tse Michael Wu, Hanseung Lee, Tatsuo Itoh

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

2 Scopus citations

Abstract

Vialess shielded composite right/left-handed (CRLH) stripline is proposed. The structure preserves the CRLH properties while preventing undesired radiations and minimizing electromagnetic interference (EMI) coupling from the surrounding noisy environments. The vialess topology also allows a simple realization option. As an application example, a 3-dB directional coupler and a novel broadband tunable directional coupler are designed and fabricated. For the 3-dB coupler, both simulated and measured results show high coupling level over 33 % operation bandwidth. For the broadband tunable coupler, a single varactor is used to tune the coupling level between the two output ports. Simulation results based on the ideal variable capacitor show the amplitude difference between the two outputs ports can be tuned from 0 to 6 dB over the percent bandwidth of around 32 %. Fabricated circuit shows the tuning capability, verifying the feasibility of designing broadband tunable coupler based on CRLH stripline. The proposed structure may be applicable for high frequency microwave waveguides requiring broadband dispersive characteristics of the CRLH structure.

Original languageEnglish (US)
Title of host publicationEuropean Microwave Week 2014: Connecting the Future, EuMW 2014 - Conference Proceedings; EuMC 2014: 44th European Microwave Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages315-318
Number of pages4
ISBN (Print)9782874870354
DOIs
StatePublished - Dec 15 2014
Externally publishedYes
Event2014 44th European Microwave Conference, EuMC 2014 - Held as Part of the 17th European Microwave Week, EuMW 2014 - Rome, Italy
Duration: Oct 6 2014Oct 9 2014

Other

Other2014 44th European Microwave Conference, EuMC 2014 - Held as Part of the 17th European Microwave Week, EuMW 2014
CountryItaly
CityRome
Period10/6/1410/9/14

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Keywords

  • Composite right/left-handed (CRLH)
  • directional coupler
  • stripline
  • tunable

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Choi, J. H., Wu, C. T. M., Lee, H., & Itoh, T. (2014). Vialess composite right/left-handed stripline and its applications for broadband 3-dB and tunable couplers. In European Microwave Week 2014: Connecting the Future, EuMW 2014 - Conference Proceedings; EuMC 2014: 44th European Microwave Conference (pp. 315-318). [6986433] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/EuMC.2014.6986433