Rainey Jan K, DeVries Jeffrey S, Sykes Brian D
Protein Engineering Network of Centres of Excellence and Department of Biochemistry, University of Alberta, 419 Medical Sciences Building, Edmonton, Alberta, Canada.
J Magn Reson. 2007 Jul;187(1):27-37. doi: 10.1016/j.jmr.2007.03.016. Epub 2007 Apr 6.
The inductance of a radiofrequency coil determines its compatibility with a given NMR probe circuit. However, calculation (or estimation) of inductance for radiofrequency coils of dimensions suitable for use in an NMR probe is not trivial, particularly for flat-coils. A comparison of a number of formulae for calculation of inductance is presented through the use of a straightforward inductance measurement circuit. This technique relies upon instrumentation available in many NMR laboratories rather than upon more expensive and specialized instrumentation often utilized in the literature. Inductance estimation methods are suggested and validated for both flat-coils and solenoids. These have proven very useful for fabrication of a number of new coils in our laboratory for use in static solid-state NMR probes operating at (1)H frequencies of 300 and 600MHz. Solenoidal coils with very similar measured and estimated inductances having inner diameters from 1 to 5mm are directly compared as an example of the practical application of inductance estimation for interchange of coils within an existing solid-state NMR probe.
射频线圈的电感决定了其与给定核磁共振（NMR）探头电路的兼容性。然而，对于尺寸适合用于NMR探头的射频线圈，电感的计算（或估算）并非易事，尤其是对于扁平线圈。通过使用一个简单的电感测量电路，对多种电感计算公式进行了比较。该技术依赖于许多NMR实验室都具备的仪器设备，而非文献中经常使用的更昂贵、更专业的仪器。针对扁平线圈和螺线管，提出并验证了电感估算方法。这些方法在我们实验室已被证明对于制造许多用于在300和600MHz的¹H频率下运行的静态固态NMR探头的新线圈非常有用。作为电感估算在现有固态NMR探头内线圈互换中的实际应用示例，对内径从1到5mm、测量电感和估算电感非常相似的螺线管线圈进行了直接比较。
