引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 923次   下载 379 本文二维码信息
码上扫一扫!
分享到: 微信 更多
粉末材料的变温介电常数测量
高博, 陈楠, 周舒, 童玲
电子科技大学 自动化工程学院, 成都 611731
摘要:
介绍了粉末材料介电常数变温测试系统,测试温度可达200 ℃。测试系统以传输/反射法为理论基础。测试系统有两个关键的部分,一是利用去嵌入技术去除转接头和垫片的影响;二是温度控制系统,该系统包括被测件的设计,隔热和温度分布情况等。利用该系统,对不同温度下模拟月壤的介电常数进行了测量,在不同温度下,模拟月壤LLB-07和月壤JSC-1A的介电常数非常接近,模拟月壤的介电常数及损耗正切随着温度的升高而增加。利用本文的测试系统能够实现粉末材料的变温介电常数测试。
关键词:  介电常数;传输/反射法;TRL校准;模拟月壤
DOI:10.15982/j.issn.2095-7777.2018.6.012
分类号:V45
基金项目:探月工程三期预先研究资助项目(TY3Q20110029-7);高性能多功能矢量网络分析仪工程化及应用开发资助项目(2016YFF0102103)
Measurement of Temperature Dependent Dielectric Constant of Powder Materials
GAO Bo, CHEN Nan, ZHOU Shu, TONG Ling
School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Abstract:
In this paper,a dielectric constant measurement system for powder materials is presented,which can work at different temperatures ranging from room temperature to 200℃.This system is developed based on the theory of NRW algorithm using coaxial line. There are two key design factors of this system. One is an improved calibration method to remove the adapter and pads. Another is the temperature distribution is analyzed and optimized using ANSYS thermal analysis to ensure the temperature is uniform in the test fixture and is safe enough to connect to the Vector Network Analyzer (VNA). In this paper,the simulated lunar soil is measured from room temperature to 200℃,from1 GHz to 18 GHz. At different temperatures,the permittivity of simulated lunar soil LLB-07 and lunar soil JSC-1A is very similar. The dielectric constant and loss tangent of simulated lunar soil increase with the increase of temperature. The test system of this paper can be used to test the variable temperature permittivity of powder materials.
Key words:  dielectric constant;NRW method;TRL calibration;simulated lunar soil