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- W2901830892 abstract "In this work, we propose and discuss methods of tuning eigenmode resonance frequencies of wire metasurfaces. Fine tuning of metasurface properties is essential for maximizing its coupling with transmitting and receiving radiofrequency (RF) coils of a magnetic resonance imaging (MRI) system. We have studied numerically and experimentally two designs of metasurfaces with different tunability mechanisms. The first design is a hybrid structure based on periodic wires with extremities penetrating high-permittivity dielectric volumes, where tunability achieved by changing properties of the dielectric parts. The second metasurface is formed by an array of capacitively loaded telescopic wires that permit to adjust the eigenmode resonance frequencies by mechanical expansion of the wires. Both metasurfaces demonstrated the spectacular capability to locally enhance the magnetic field of an external RF coil being precisely tuned to the Larmor frequency of a clinical MRI scanner." @default.
- W2901830892 created "2018-11-29" @default.
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- W2901830892 date "2018-08-01" @default.
- W2901830892 modified "2023-10-16" @default.
- W2901830892 title "Tunability methods for magnetic resonance imaging applications of metasurfaces" @default.
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- W2901830892 doi "https://doi.org/10.1109/metamaterials.2018.8534104" @default.
- W2901830892 hasPublicationYear "2018" @default.
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