Impact of the Characteristic Impedance of Coaxial Lines on the Sensitivity of a 750-MHz Electronically Tunable EPR Resonator
- Autores: Nakaoka R.1, Komarov D.1, Matsumoto S.1, Hirata H.1
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Afiliações:
- Division of Bioengineering and Bioinformatics, Graduate School of Information Science and Technology, Hokkaido University
- Edição: Volume 49, Nº 8 (2018)
- Páginas: 853-867
- Seção: Original Paper
- URL: https://journals.rcsi.science/0937-9347/article/view/248059
- DOI: https://doi.org/10.1007/s00723-018-1001-6
- ID: 248059
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Resumo
A 750-MHz electronically tunable resonator was investigated in terms of the sensitivity of electron paramagnetic resonance (EPR) signal detection. The conversion efficiency of the radio-frequency magnetic field was calculated for resonators with 50- and 100-Ω coaxial coupling lines using three-dimensional (3D) microwave field and microwave circuit simulators. Based on the simulation results, two tunable resonators were physically constructed and compared in terms of EPR signal sensitivity using a nitroxyl radical solution. While the resonator with 100-Ω coaxial lines provided 14% greater signal intensity, its signal-to-noise ratio was lower than that of the resonator with 50-Ω lines. To demonstrate the capability of the constructed tunable resonator for EPR imaging experiments, a solution of nitroxyl radical and the leg of a tumor-bearing mouse were visualized.
Sobre autores
Ririko Nakaoka
Division of Bioengineering and Bioinformatics, Graduate School of Information Science and Technology, Hokkaido University
Email: hhirata@ist.hokudai.ac.jp
Japão, North 14, West 9, Kita-ku, Sapporo, 060-0814
Denis Komarov
Division of Bioengineering and Bioinformatics, Graduate School of Information Science and Technology, Hokkaido University
Email: hhirata@ist.hokudai.ac.jp
Japão, North 14, West 9, Kita-ku, Sapporo, 060-0814
Shingo Matsumoto
Division of Bioengineering and Bioinformatics, Graduate School of Information Science and Technology, Hokkaido University
Email: hhirata@ist.hokudai.ac.jp
Japão, North 14, West 9, Kita-ku, Sapporo, 060-0814
Hiroshi Hirata
Division of Bioengineering and Bioinformatics, Graduate School of Information Science and Technology, Hokkaido University
Autor responsável pela correspondência
Email: hhirata@ist.hokudai.ac.jp
ORCID ID: 0000-0002-6906-1608
Japão, North 14, West 9, Kita-ku, Sapporo, 060-0814