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高博, 陈楠, 周舒, 童玲. 粉末材料的变温介电常数测量[J]. 深空探测学报(中英文), 2018, 5(3): 286-291. DOI: 10.15982/j.issn.2095-7777.2018.6.012
引用本文: 高博, 陈楠, 周舒, 童玲. 粉末材料的变温介电常数测量[J]. 深空探测学报(中英文), 2018, 5(3): 286-291. DOI: 10.15982/j.issn.2095-7777.2018.6.012
GAO Bo, CHEN Nan, ZHOU Shu, TONG Ling. Measurement of Temperature Dependent Dielectric Constant of Powder Materials[J]. Journal of Deep Space Exploration, 2018, 5(3): 286-291. DOI: 10.15982/j.issn.2095-7777.2018.6.012
Citation: GAO Bo, CHEN Nan, ZHOU Shu, TONG Ling. Measurement of Temperature Dependent Dielectric Constant of Powder Materials[J]. Journal of Deep Space Exploration, 2018, 5(3): 286-291. DOI: 10.15982/j.issn.2095-7777.2018.6.012

粉末材料的变温介电常数测量

Measurement of Temperature Dependent Dielectric Constant of Powder Materials

  • 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。

     

    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.

     

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