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介质材料介电常数均匀性测试评价系统
高冲1,李恩1,2,李灿平2,余承勇1,王强1
1.电子科技大学,成都 611731;2.成都恩驰微波科技有限公司,成都 611731
摘要:
介绍了针对介质材料的介电常数的均匀性测试方法,基于谐振微扰法和场分析理论,建立了圆柱腔内样品分段测试模型。利用工作在TM0n0的圆柱腔进行方法可行性验证后,设计了一套由矢量网络分析仪、计算机、圆柱腔、移动装置等组成的介电常数均匀性测试系统,并利用自动化测试软件,旨在实现对介质材料介电常数的在线自动化均匀性测试。通过对三种典型介质材料进行均匀性测试分析,与材料制造商比对的测试差别分别小于0.02、0.04和0.15,证明了该均匀性能测试评价系统的可行性和有效性。
关键词:  介质材料  介电常数  圆柱腔  均匀性测试
DOI:10.12044/j.issn.1007-2330.2019.04.016
分类号:TM931
基金项目:国家自然科学基金 61671123 61001027 国家自然科学基金(61671123和61001027)
Permittivity Homogeneity Measurement System for Dielectric Material
GAO Chong1,LI En1,2,LI Canping2,YU Chengyong1,WANG Qiang1
1.University of Electronic Science and Technology of China, Chengdu 611731;2.Chengdu Enchi Microwave Technology Co., Ltd, Chengdu 611731
Abstract:
This paper introduces the homogeneity measurement method of dielectric material’s permittivity. According to the resonant perturbation and field analysis theory, a measurement model of double sections in a cylindrical cavity is established. A cylindrical cavity is designed at TM0n0 to verify the feasibility of the measurement method and the measurement resolution. The measurement system that consists of vector network analyzer, computer, cylindrical cavity, and movement device is designed to realize the online and automatic measurement using the measurement software. Three typical samples are measured by using this system, whose measurement differences compared with the data from the manufacturer are less than 0.02, 0.04, and 0.15, respectively. These results are analyzed to prove the feasibility and effectiveness of the measurement system.
Key words:  Dielectric material  Permittivity  Cylindrical cavity  Homogeneity measurement