自由空间法测量电磁材料电磁参数

基于对自由空间法测试材料电磁参量原理的研究,对传统方法进行分析及改进,解决了测试过程

中透射系数存在的相位模糊性和由于S11 →0 时导致的半波谐振问题,最后搭建了测试系统,并使用该系统对

常见的微波介质材料在2 ~18 GHz 频带下进行了电磁参数的测试。结果表明,由于天线性能特性的限制,此测

试系统4 ~14 GHz 范围内具有良好的效果。此测试系统具有测试速度快、结构简单、方便准确的定位、测试精

度高等特点。

Measurement of Electromagnetic Parameters of ElectromagneticMaterials by Free-Space Method

Based on the research on the measurement of electromagnetic parameters, through analyzing and improving

the traditional method, the phase shift ambiguity problem and the half-wavelength divergence were solved,

and finally a set of test system to test the electromagnetic parameters of common materials in the bandwidth from 2 to

18 GHz was built. Due to the restrictions of performance of antenna, the measure result is not accurate between 2 to

4 GHz and 14 to 18 GHz frequency range. This test method has the feature of fast, simple structure, convenient and

accurate positioning, high test accuracy and so on.