Ku波段开腔电介质高温自动测量系统

 介绍了一种测量低损耗天线罩材料的开腔高温自动测量系统。该系统采用扫频方式程控标量网络分析仪对开腔进行扫频测量，得到介质加载前后腔体的谐振频率与Q值，并由此计算出被测材料的介电常数和损耗角正切；介质采用特制硅碳管加热，由温度控制器对其控制，最高温度可达1 000 ℃以上。用此系统对聚四氟乙烯和一种低损耗天线罩材料进行测量对比。结果表明，测得的聚四氟乙烯结果与文献结果相近，天线罩材料相对介电常数的实部随温度升高而增加。

High temperature automatic dielectric measurement system at Ku band using open resonator technique

A high temperature open resonator measuring system for low loss radome materials is introduced. The scalar network analyzer measures the open resonator with sweeping frequency method under the control of a computer. After getting the resonance frequency and Q factor of the vacant and loaded cavity, the system works out the dielectric parameters and loss tangent of the material being tested. The dielectric is heated up by the temperature controller with a highest temperature more than 1 000 ℃. The test results of teflon by this system are close to the data in the literatures and the measurements of a kind of low loss radome material are also quite satisfactory.