【作者】 刘海韬； 程海峰； 周永江； 张德勇； 楚增勇；

【Author】 LIU Hai-tao, CHENG Hai-feng, ZHOU Yong-jiang, ZHANG De-yong, CHU Zeng-yong (Key Lab. of New Ceramic Fibers and Composites, College of Aerospace and Materials Engineering, National University of Defence Technology, Changsha 410073, China)

【机构】 国防科技大学航天与材料工程学院CFC重点实验室；

【摘要】 分析了传统等效电路法对含容性频率选择表面(capacitive FSS)单层吸波材料吸波性能计算的不足, 并用有限元法对此种结构吸波性能进行了计算。结果表明:FSS的位置、阵列尺寸以及单元尺寸均可以对吸波性能产生较大影响;当容性FSS位于吸波材料表面时可以明显改善低频性能,当其位于较靠近金属板位置时, 反射率曲线出现双峰,带宽增加。通过实验验证,计算结果与实验结果较吻合．改变了传统上容性FSS不能在单层吸波材料中应用的看法。更多还原

【Abstract】 In this paper, the disadvantages of calculating the absorbing properties of single layer radar absorbing materials containing capacitive FSSs using equivalent circuit method were analyzed, and the absorbing properties were studied by finite element method. The calculated results indicate that the positions of FSS, periodic sizes and cell sizes all can affect the absorbing properties of RAMs, and the absorbing properties at low frequency can be improved when the capacitive FSSs are on the surfaces of the RAMs; and the bandwidths will be broadened while the capacitive FSSs are close to the metal plate, which are in agreement with experimental results. So, the traditional viewpoints of capacitive FSSs can not be used in the single layer RAMs are changed.更多还原