【作者】 陈春平； 陈明妍； 余剑平； 钮茂德； 徐得名；

【Author】 Chen ChunPing,Chen MingYan,Yu JianPing,Niu Maode,Xu Deming (Shanghai Dielectric Measurement Laboratory,School of Communication & Information Engineering,Shanghai University,Shanghai 200072,

【机构】 上海大学通信与信息工程学院；

【摘要】 本文以"变厚度法"(测量不同厚度样品同时获得复电磁参数)为例,综合考虑各种误差因素,导出微分形式的不确定度公式,用于确定电磁参数测量的精确度。文章研究了测量不确定度与样品厚度的关系,给出三维示意图。通过对多种样品的实测电磁参数的不确定度与实际误差的比较,证明本文导出的不确定度计算公式是便捷有效的。更多还原

【Abstract】 A differential uncertainty equation is established for measuring the complex electromagnetic(EM) parameters,i.e.permittivityεand permeabilityμ,of the short circuited stratified materials using an open-ended coaxial probe,in the systematical consideration of the error sources associated with computation,modeling,measurements,etc..A numerical analysis is carried out based on the"Thickness-Varying Method"to provide the relations between the uncertainties and sample thicknesses in 3D figures.The comparison between the measured errors and theoretical uncertainty prediction validates the feasibilities of our formulas.更多还原