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 - London, United Kingdom
    Duration: 4 Oct 20166 Oct 2016
    Conference number: 46


    Conference46th European Microwave Conference
    Country/TerritoryUnited Kingdom
    Internet address


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


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