Research on Absorbing Properties of Double-layer Radar Wave Absorbing Materials
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摘要: 依据阻抗匹配原理与电磁波传播规律,设计了具有阻抗渐变结构的双层吸波材料。研究了以硫化锑作为匹配层填充物,炭粉作为吸收层填充物的双层吸波体的吸波性能。结果表明:面层硫化锑填充量选定为15%(ω),当底层炭粉填充量为30%(ω)时,试样总厚度为4.0mm,测试频率为8~18GHz,R<-10dB的频宽为7.6GHz,最大吸收峰值在13.8GHz(R=-20.89dB)。当底层炭粉填充量为35%(ω)时,试样总厚度为3.4mm,R<-10dB的频宽为7.2GHz,最大吸收峰值在13.8GHz(R=-15.85dB)。具有一定的工程应用价值。Abstract: According to the resistance matching principle and electromagnetic spreading regulation,double-layer absorbing materials with resistance gradual changing structure were designed.With Sb2S3 and carbon black as the absorbents separately in the matching layer and in the absorbing layer.The absorbing property of the double-layer radar wave absorbing material was investigated.The results indicated that in the frequency range 8~18GHz when Sb2S3 packing ratio was 15% and carbon black packing ratio was 30%,the maximum waves absorbing peak of the sample with the thickness of 4mm was -20.98dB at 13.8GHz and had a hand-width of 7.6GHz(R＜-10dB),and when the carbon black packing ratio was 30% the maximum waves absorbing peak of the sample with the thickness of 3.4mm was -15.85dB at 13.8GHz and had a hand-width of 7.2GHz(R＜-10dB) suggesting the materials are valuable for practical use.
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