中文摘要：

通过热压成型工艺制备了含容性FSS结构的铁氧体复合吸波材料，按GJB2038-94标准，利用Agilent公司的矢量网络分析仪PNA8363B采用弓形测量法在8～18GHz频率范围对复合材料的反射率进行测试。研究结果表明，FSS的缝隙宽度、缝隙间距、FSS结构的方块电阻以及FSS结构的放置位置对复合材料的吸波性能都有很大影响。这些参数都存在一个最佳值，在其他条件不变的情况下，缝隙宽度为5mm，缝隙间距为7．2mm，FSS方块电阻为60Ω／□时，复合材料的吸波性能最好。FSS在复合材料中间层相比在面层和反射层，复合材料具有较好的吸波性能。通过设计FSS结构的频率特性可以达到改善材料吸波性能的目的，为高性能吸波材料的设计提供一条可行的途径。

英文摘要：

Ferrite radar absorbing materials containing capacitive frequency selective surface （FSS） were prepared by heat compress molding techniques and the reflection loss of ferrite composites in the range of 8-18GHz were measured by a calibrated naval research laboratory （NRL） arch using a PNA8363B network analyzer of agilent corporation followed the GJB2038-94. It is found that the reflection loss of the ferrite composites containing ca- pacitive FSS such as the slot width, the interval distance, the square resistance of FSS and the position of FSS in composites. For the slot width, the interval distance and the square resistance, best values exist for better microwave absorbing properties of the composite, which are 5ram, 7.2mm and 60Ω/□, respectively. The bet- ter reflection loss of composites can be reached when the FSS placed in the middle layer rather than the face layer and the reflection layer. The aim to improve the reflection loss of composites can be reached by controlling the frequency character of FSS in composites, which is a feasible path for design the good radar absorbing materials.