基于同轴谐振腔法的材料电参数测量  

Measurement of electrical parameters of material based on coaxial resonant cavity method

作　　者：薛冰[1,2] 纪奕才[1,2] 

机构地区：[1]中国科学院大学,北京100049 [2]中国科学院电磁辐射与探测技术重点实验室,北京100190

出　　处：《电子测量技术》2017年第4期43-46,共4页Electronic Measurement Technology

摘　　要：以岩石电参数测量为背景,根据岩石材料的电性特点,对谐振腔法测试电参数进行了比较详细的研究。利用仿真软件设计并改进了常规谐振腔的结构,设计了一种小型化和有效的测量仪器,以方便携带和使用。然后,利用微扰法和建立等效电路模型对谐振腔进行建模,推导出电参数和谐振腔参数直接的关系,再通过拟合的办法得到关系式的参数信息。对模型进行仿真测试,比较了等效电路模型和微扰法的精度,可以看出等效电路模型的测量误差小于5%。最后搭建了测试系统,对一些材料进行测试,得到了满足测试要求的结果,并分析了测量系统的不足以及改进方法。Based on the measurement of electrical parameters of the rock,a detailed study employing resonant cavity method has been carried out by simulation,according to the electrical characteristics of rocks.The performance of the conventional resonator has been improved by designing a miniaturized measure instrument,which is convenient to be carried out and used.Then,the perturbation method along with the equivalent circuit method has been both employed to simulate this resonator.The relationship of electrical parameters and resonant parameters has been deduced.Furthermore,the exact relationship of them has been elicited by the method of fitting.The model has been tested by simulating,and the accuracy between equivalent circuit model and perturbation method has been compared.Measurement error using equivalent circuit model is under 5%.Finally,some materials are measured,and the deficiency and the improving methods are analyzed based on the built measurement system.

关 键 词：电参数测量 等效电路法 微扰法 

分 类 号：TN911.6[电子电信—通信与信息系统]