【摘要】 首先从石英纤维增强二氧化硅雷达罩的制备工艺出发,分析石英纤维增强二氧化硅雷达罩的吸潮因素;然后利用介质平板透波理论分析石英纤维增强二氧化硅雷达罩吸潮后透波率与材料介电性能变化的关系;采用物理光学法对正切卵形石英纤维增强二氧化硅雷达罩的透波性能进行仿真计算,得出石英纤维增强二氧化硅雷达罩吸潮后介电损耗对透波有明显影响的结论;加工石英纤维增强二氧化硅雷达罩,放置于室温环境下,观察其吸潮规律,利用雷达导引头天线对石英纤维增强二氧化硅雷达罩的透波性能进行测试,验证了石英纤维增强二氧化硅雷达罩吸潮后透波率整体下降的结论;最后,对石英纤维增强二氧化硅雷达罩的防潮方式进行初步探讨,提出几种防潮方案。更多还原

【Abstract】 Quartz fiber reinforced silicon dioxide composites have good wave transmission performance. But, due to its strong moisture absorption performance, the dielectric loss of the material increases after moisture absorption. The wave transmission performance of radar seeker antenna decreases obviously when passing through radome. In this paper, theoretical analysis and numerical simulation are used to analyze the dielectric loss of quartz fiber reinforced silicon dioxide composites after moisture absorption. The increase of dielectric loss is the main factor leading to the decrease of the performance of seeker antenna. Based on the preparation technology of quartz fiber reinforced radome, the moisture absorption factors of radome are analyzed. The relationship between the transmission efficiency and dielectric properties of radome after moisture absorption is analyzed by using the theory of dielectric slab transmission theory. The wave-transimissivity of a radome is simulated using the physical optics, and the conclusion that the dielectric loss tangent affects the wave transmission of radome is obtained. Then a radome is prepared and placed in the room with normal temperature environment, and its moisture absorption law is observered. Finally, the radome′s wave transmission performance is tested with the seeker antenna, which verifies the conclusion that the radome′s wave transmission efficiency decrease as a whole after absorbing moisture. Finally, the anti-moisture way of the radome is discussed and several moisture-proof schemes are proposed.更多还原