采用Nomex蜂窝芯、混合物吸收剂和酚醛树脂制备了蜂窝夹层复合材料,研究了蜂窝芯高度、蒙皮厚度和蜂窝芯增重对其吸波性能的影响.结果表明:随着蜂窝芯高度的增加,其夹层复合材料的-10 dB有效带宽向低频扩展,18 mm高度蜂窝夹层复合材料在2～18 GHz频段反射率均小于-10 dB;随着蒙皮厚度的增加,蜂窝夹层复合材料的低频反射率降低,但高频反射率升高;随着蜂窝芯黏附吸收剂质量的增加,其吸收峰频率向低频移动.
The samples of absorbing honeycomb were prepared by using Nomex honeycomb, muhicomponent absorbent and phenolic resin. Effects of height, thickness of sheet and content of the absorbent of the honeycomb on radar absorbing properties of the honeycomb sandwich were investigated. The results indicate that effective bandwidth in which reflectivity is less than -10 dB extends to low frequency as height of the honeycomb increases, as thickness of the sheet increases, reflectivity of the absorbing honeycomb sandwich in low frequency band decreases and that in high frequency band increases, dip frequency of the reflectivity lowers as the weight of the absorbent adhering to the honeycomb wall increases.
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