高超声速飞行器毫米波天线罩电气性能研究

Research on Electrical Property of Hypersonic Aircraft Millimeter-Wave Radome

针对高超声速飞行器毫米波天线罩的工作环境和要求,分析毫米波天线罩电性能设计的难点。通过与低频段低速天线罩在设计上的比对,分别从天线罩厚度、入射角、材料介电性能3个关键的物理量入手,梳理影响毫米波天线罩电气性能的主要因素。根据已有防热透波材料体系,在继承低频低速天线罩二维射线追踪理论设计方法,并且充分考虑毫米波天线罩电气性能新特性的基础上,综合提出高超声速飞行器毫米波天线罩材料选择及壁厚精确设计方法。通过电磁仿真和实测数据的对比评估毫米波天线罩的电性能,验证了天线罩设计方法的正确性。

This paper analyzed the difficulties of electrical property design on hypersonic aircraft millimeter-wave radome,based on working environments and requirements.By comparing with low- frequency or low-speed radome,considering thickness,incident angle and material dielectric properties respectively,proposed the critical physical effects of electrical property of millimeter-wave radome.According to the existing material system,low-frequency theoretical methods and the new feature in millimeter-wave,comprehensively proposed methods on material selection and thickness design precisely.By comparing the simulation and experimental data evaluated the electrical properties of millimeter-wave radome,verified the correctness of the design methods.