星载轻质薄膜式充气透波防热结构的微波及热量传输特性研究

Satellite borne lightweight thin-film inflatable microwave transparent thermal shield structure(IMTTS), a new kind of thermal control structure, was proposed in this project after analyzing the high-frequency characteristics and the out heat flow of synthetic aperture antennas of geostationary interferometric microwave atmospheric sounder, which provides a new thinking and new approach to solve the bottleneck-like difficulty of thermal control for geostationary antennas when covering IMTTS on the working surfaces to resist the sunshine. In this project it will focus on theories researches about the microwave transfer and heat transfer of fiber-weave-structure which have more advantage in mechanical adaptability, in which the influences of the size, the surface, the concentration of the gas and so on will be studied. These microwave and thermal respect researches will become one part of theoretical supports for the first step of applying IMMTTS on the geostationary interferometric microwave antennas to help control temperature. IMMTTS can also be widely used in the fields of astronautics thermal control and the device package of the THz antenna.

本项目针对星载地球静止轨道干涉式毫米波大气探测仪天线阵列在复杂太空环境下对热场控制的迫切需求，创新性提出一种轻质薄膜式充气透波防热结构用于天线阵列的热场控制，重点研究这种新型的充气透波防热膜层结构的微波传输特性和太阳光传输及能量分布特性，考察微观结构尺寸、表面特性及气体浓度等对微波传输特性、太阳光传输特性、热量传递的影响。探索天线阵列热场的传输、分布及演变过程，建立该结构的场反馈模型，为阶段性实现这种新兴温控结构在静止轨道高频天线阵上的应用提供电磁设计和热学方面的基础理论支撑。同时探索这种新型热控结构在其他航天在轨热控领域中的应用。

本项目面向剧烈变化太阳外热流环境下高频微波天线透微波热防护问题，选择具有良好透波特性且能耐高温耐辐射的材料,对轻质充气透波膜层结构下的微波传输特性和热量传输特性进行研究，主要考察微观结构尺寸、表面特性等对热量传递特性、太阳光传输特性、微波传输的影响，并且探索了某天线使用透波材料后热场变化，温度可发生显著变化，低温时可降低保生存需要的加热功耗，节约能源，高温时可以帮助阻隔剧烈外热流的流入，有利于降低温度波动，提高阵列的一致性，为分阶段地实现这种新型温控结构在静止轨道高频天线阵上的应用提供电磁设计和热学方面的理论指导。