材料微波反射率高温测量系统设计  

Design of Microwave Reflectivity Test System of Material at High Temperature

作　　者：周亮[1,2] 邓联文[1,2] 肖鹏[2] 黄生祥[1] 周伟[2] 罗衡[2] 洪文[2] 李杨[2] 唐益群[1,2] 

机构地区：[1]中南大学物理与电子学院,长沙410083 [2]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《计算机测量与控制》2013年第6期1431-1433,共3页Computer Measurement &Control

基　　金：国家重点基础研究发展规划项目(2011CB605804)

摘　　要：材料微波反射率是直接评价材料吸波性能的重要指标,常温下材料反射率测量技术较为成熟并已获得广泛应用,随着高温吸波材料研究工作的迫切性,对材料高温下反射率的测量显得尤为重要;以弓形法为基础,研制了一套变温测试平台,该系统能够在1～40GHz频率范围内实现室温-1 000℃的吸波材料反射率测试;通过对标准金属板和待测样板的封装进行改进,解决了待测样板表面弯曲问题对测试结果的影响,提高了测试准确度,有利于高温实时校准和测试;利用矢量网络分析仪的时域门功能,消除了收发天线间的直漏信号,提高了测试精度;最后通过在不同极化方式、不同入射角度、不同测试温度下对吸波材料反射率进行测试,验证了测试系统的可行性。Microwave retlectlvlty is a very important lnCllcator tot materials alosorolng perlormance, RelleCtlVlty measurement tecnnoiogy at room temperature is mature and has been widely used. Along with the urgency of study on high temperature absorbing materials, the materials reflectivity measurement at high temperature is particularly important. In this paper, a set of variable temperature test platform based on the arch method is designed, which is available for the reflectivity test in the 1--40 GHz frequency range from room temperature to 1 000 ℃. In order to avoid the bending of testing plate, the package of the standard metal plate and the testing plate is improved, which is beneficial 7to the real time calibration and measurement at high temperature. Besides, the time domain gating function of vector network analyzer which eliminated the direct leakage signal from the sending and receiving antennas, result in better accuracy. Finally, the feasibility of the measurement system is verified by testing from different polarization, different incident angle and different temperature.

关 键 词：微波反射率 吸波材料 矢量网络分析仪 时域门功能 高温测试 

分 类 号：TN98[电子电信—信息与通信工程]