【摘要】 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。更多还原

【Abstract】 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.更多还原