Tunable 13C/1H dual channel matching circuit for dynamic nuclear polarization system with cross-polarization

Oleksandr Rybalko, Sean Bowen, Vitaliy Zhurbenko, Jan Henrik Ardenkjær-Larsen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


In this paper we report initial results of design and practical implementation of tuning and matching circuit to estimate a performance of Dynamic Nuclear Polarization (DNP) at a magnetic field of 6.7 T. It is shown that developed circuit for signal observation is compact, easy to make and provides low return loss (typically better than −45 dB) at a tuning range ±3 MHz for both resonant frequencies. In addition, transmission parameters measured between 13C and 1H channels are less than −17 dB and −50 dB for 71.8 MHz and 285.5 MHz, respectively showing a good isolation between the two channels. Measurement results with a tuning and matching circuit prototype are presented including obtained spectra (13C and 1H) and estimation of the signal-to-noise ratio.
Original languageEnglish
Title of host publicationProceedings of the 46th European Microwave Conference
Publication date2016
ISBN (Print)978-2-87487-043-9
Publication statusPublished - 2016
Event46th European Microwave Conference (EuMC) - London, United Kingdom
Duration: 4 Oct 20166 Oct 2016


Conference46th European Microwave Conference (EuMC)
Country/TerritoryUnited Kingdom


  • Coils
  • Tuning
  • Resonant frequency
  • Protons
  • Carbon
  • Polarization
  • RLC circuits
  • Tuning range
  • Circuit
  • Dynamic nuclear polarization
  • Enhancement
  • Losses


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