吸波材料电参数改变对暗室静区性能的影响分析

Analysis on the quiet zone performance due to degraded absorbers

大面积铺设吸波材料是射频仿真暗室内实现反射能量衰减的主要手段,也是实现静区性能的重要措施。文章针对某暗室中铺设的吸波材料,从吸波机理出发,结合有关资料的数据分析结果,研究了吸波材料填充介质脱落后的电参数变化规律;以测试数据为基础,分析了由此引起的吸波材料阻抗匹配特性和反射率的改变情况;结合暗室的结构特点,仿真计算了电参数改变对暗室静区性能的影响。

A mass of Absorbers are used in RF simulate anechoic chamber to cut down the reflectivity of electromagnetic field,and which is the most important method to attain perfect quiet zone performance.Based on the theory of absorbers and some other researcher＇ relational work,the text researches on the gradual change rule of electric parameters by contrasting,when part of stuffing medium fell down during tests in someone chamber.Further more,it discoursed upon the change characteristic of material impedance and reflectivity using testing data for the shift of electric parameters.In the end,considering of the contribution of the chamber,the influence on the quiet zone performance was given by simulation.