Magnets and RF Surface Coils for NMR Sensor Applications 


Vol. 43,  No. 9, pp. 1509-1516, Sep.  2018
10.7840/kics.2018.43.9.1509


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  Abstract

The basic concept for making NMR sensors which are highly utilizable in various fields such as chemistry, medicine, physics, and biology is presented and key components of the NMR sensor, ie. magnets and surface coils were investigated through computer simulation and characterized after being fabricated. The Nd rare-earth permanent magnets were fabricated in various sizes and characterized ranging from 3 to 6 mm in diameter and 1 to 7 mm in height. Using CMOS process, the circular spiral surface-coils were fabricated by depositing Al-1%Si metal and being annealed at 400 °C. The line width, gap, and outer diameter were designed to be 10 μm, 2 μm and 0.4 mm, respectively. A high resistive impedance of 8.7 Ω/mm and a low Q value less than 1 at 10.47 MHz were measured. On the other hand, the PCB surface coils with a line width of 100 μm and 150 μm and an outer diameter of about 2 mm show a low resistive impedance of less than 1 Ω, and a high Q value of 4.85 ± 0.18 at 10.27 MHz.

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  Cite this article

[IEEE Style]

I. G. Kim, J. T. Kim, M. L. Lee, "Magnets and RF Surface Coils for NMR Sensor Applications," The Journal of Korean Institute of Communications and Information Sciences, vol. 43, no. 9, pp. 1509-1516, 2018. DOI: 10.7840/kics.2018.43.9.1509.

[ACM Style]

In Gyoo Kim, Jin Tae Kim, and Myung Lae Lee. 2018. Magnets and RF Surface Coils for NMR Sensor Applications. The Journal of Korean Institute of Communications and Information Sciences, 43, 9, (2018), 1509-1516. DOI: 10.7840/kics.2018.43.9.1509.

[KICS Style]

In Gyoo Kim, Jin Tae Kim, Myung Lae Lee, "Magnets and RF Surface Coils for NMR Sensor Applications," The Journal of Korean Institute of Communications and Information Sciences, vol. 43, no. 9, pp. 1509-1516, 9. 2018. (https://doi.org/10.7840/kics.2018.43.9.1509)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880