基于矢量网络分析仪的相对介电常数扫频测量  

Measurement with Sweeping Frequency for Complex Permittivity Based on VNA

作　　者：秦凡 韦高[1] 

机构地区：[1]西北工业大学电子信息学院,西安710129

出　　处：《宇航计测技术》2011年第2期27-30,共4页Journal of Astronautic Metrology and Measurement

摘　　要：采用波导短路法对介质材料的相对介电常数进行扫频自动测量,通过VC++开发了一套宽频带(8GHz^18GHz)复介电常数自动测量系统。用矢量网络分析仪对波导采样器进行扫频测量,不仅可以得到被测材料介电常数的频率特性,而且能够解决超越方程多值解的判断问题,并减少了测量中的误差。通过对介质样品的实际测量,可以发现,该自动测量系统操作简单、测量速度快,测量结果能够达到较高准确度,结果令人满意。The waveguide method of measuring the complex permittivity parameter is used, and then an automatic measure system （8GHz - 18GHz） based on VC ＋＋ is built. The measurement using VNA（ Vector Network Analyzer） with sweeping frequency not only could get the frequency characteristic of complex permittivity but also make the choice of correct result in the different results of transcendental equation convenient, and the accuracy of measure results is improved too. Through actual measurement, the automatic measure system is easy to operate and works at high speed. The tested results reach high accuracy and satisfy the requirements of project.

关 键 词：矢量 网络分析仪 电容率 波导 短路 

分 类 号：TM930.12[电气工程—电力电子与电力传动]