天线窗材料热透波特性风洞测试方法

高超声速飞行器天线窗材料在等离子体包覆条件下的热响应和热透波特性测试，是分析天线窗材料特性、研究电磁波在等离子体和天线窗中传输特性的基础。针对等离子体和天线窗中电磁波传输特性，采用矢量网络分析仪和标准增益天线组成的电磁波传输测试系统，获得了一定频率的电磁波经过等离子体和高温天线窗之后的衰减；针对高温天线窗自身热响应特性和电磁波在其中的传输特性，研究了天线窗材料在一定热流作用下的温度分布和烧蚀特性，测试了烧蚀后处于高温状态且无等离子体覆盖的天线窗对电磁波的影响，分析了天线窗高温透波特性与常温透波特性的差异。所建立的方法，为在地面等离子体风洞中开展天线窗热透波特性研究、分析天线窗和等离子体耦合作用对电磁波传输特性的影响建立了基础。

Wind tunnel test methods for hot-wall microwave-transparency characteristics of antenna window materials

Tests of the thermal response and hot-wall microwave-transparency characteristics of plasma covered antenna window materials for hypersonic vehicles are the basis for analyzing material characteristics and studying transmission characteristics of electromagnetic waves in plasma and antenna windows. Attenuation of the electromagnetic wave with certain frequency in plasma and antenna window is obtained with vector network analysis and standard gain horns. To obtain the thermal response and hot-wall microwave-transparency characteristics of the antenna window, the temperature distribution and ablation characteristics of the antenna window under certain heat flux are obtained, the effect of the antenna window at high temperature and without plasma on the electromagnetic wave is tested, and the differences between high temperature and normal temperature antenna windows are analyzed. The test methods proposed provides a basis for research on hot-wall microwave-transparency characteristics of antenna windows and coupling effect of antenna window and plasma on transmission characteristics of the electromagnetic wave in the plasma wind tunnel.