DETERMINATION OF PERMEABILITY FROM IMPEDANCE MEASUREMENT USING VECTOR NETWORK ANALYZER
DETERMINATION OF PERMEABILITY FROM IMPEDANCE MEASUREMENT USING VECTOR NETWORK ANALYZER
复制标题
使用矢量网络分析仪通过阻抗测量确定磁导率
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
R. Dosoudil
中科院分区：
文献类型：
--
作者：
R. Dosoudil
本研究采用优化的单端口（反射系数）和两端口（并联/串联）测量方法，使用矢量网络分析仪 (VNA) 在 9 kHz 至 6.5 GHz 频率下确定固体软磁材料的复杂磁导率。介绍了测量方法的原理、测量的相量电压比（Sparameter）与复阻抗的关系以及磁导率计算方程。每种方法在阻抗范围内都具有良好的测量灵敏度，在该阻抗范围内，VNA 接收器上测得的交流电压变化很大。对于磁导率评估，分流法可提供最佳的灵敏度和稳定性，因此适用于低磁导率和高磁导率材料。
This study treats the optimised one-port (reflection coefficient) and two-port (shunt-through/series-through) measurement methods for complex permeability determination of solid soft magnetic materials using a vector network analyzer (VNA) at frequencies from 9 kHz to 6.5 GHz. The principle of measurement methods, the relationships of measured phasor voltage ratio (Sparameter) to complex impedance, and permeability calculation equations are presented. Each method gives good measurement sensitivity at the impedance range where the measured ac voltage at the VNA’s receiver significantly varies. For permeability evaluation, the shunt-through method provides the best sensitivity and stability and thus is suitable for both low and high permeability materials.