自由空间法测量电磁材料电磁参数  

Measurement of Electromagnetic Parameters of Electromagnetic Materials by Free-Space Method

作　　者：王依超[1] 郭高凤[1] 王娟[1] 李恩[1] 郑虎[1] 

机构地区：[1]电子科技大学电子工程学院,成都611731

出　　处：《宇航材料工艺》2014年第1期107-111,共5页Aerospace Materials & Technology

基　　金：国家自然科学基金资助(61001027)

摘　　要：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2-18GHz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4-14GHz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。Based on the research on the measurement of electromagnetic parameters, through analyzing and im- proving 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.

关 键 词：自由空间法 相位模糊性 半波谐振性 加脊喇叭天线 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]