摘要
通过弓形法测试2~18 GHz电磁波孔向入射和径向入射炭黑分段梯度浸渍蜂窝的吸波性能,电磁波孔向入射炭黑涂料浸渍蜂窝吸波性能稳定,随着浸渍次数的增加,有阻抗匹配的最优浸渍次数,吸波性能优于径向入射蜂窝结构吸波性能。径向入射梯度浸渍蜂窝,由于蜂窝结构的各向异性,两个方向性能差异较大,蜂窝结构能增加电磁波在蜂窝腔体中的反射次数,随着浸渍次数增加,蜂窝结构的吸波性能先减弱后提升。同时,蜂窝高度对蜂窝性能有很大影响,增加孔向入射最后段浸渍蜂窝高度,整体蜂窝高度增加,蜂窝整体的吸波性能提升,阻抗匹配效果变好,此时增加各段阶梯浸渍次数,有最优的浸渍次数,阻抗匹配效果最好,吸波性能最佳。蜂窝结构被广泛应用于军事电磁隐身,梯度浸渍能有效提升阻抗匹配效果,径向梯度浸渍蜂窝应对电磁波大角度入射有很大的发展前景。
The absorbing performance of 2~18 GHz electromagnetic wave aperture incidence and radial incidence carbon black segmented gradient impregnated honeycomb was tested by bowing method.With the increase in the number of impregnation honeycomb structure,there is an optimal immersion number of impedance matching,and the absorption performance is better than that of radial incidence honeycomb structures.Radial incidence gradient impregnated honeycomb,due to the anisotropy of the honeycomb structure,the performance difference between the two directions is large,the honeycomb structure can increase the number of reflections of electromagnetic waves in the honeycomb cavity,with the increase in the number of impregnation honeycomb structure wave absorption performance first weakened and then improved.At the same time,the honeycomb height has a great impact on the honeycomb performance,increase the hole to the incidence of the last section of the impregnated honeycomb height,the overall honeycomb height increases,the overall wave absorption performance of the honeycomb improved,impedance matching effect becomes better,at this time to increase the number of steps of each section impregnated,there is the optimal number of impregnation,impedance matching effect is the best,the best wave absorption performance.Honeycomb structure is widely used in military electromagnetic stealth,gradient impregnation can effectively improve the impedance matching effect,radial gradient impregnation honeycomb to cope with electromagnetic wave large angle incidence has great development prospects.
作者
张亚发
刘文言
刘辰旭
赵智斌
ZHANG Yafa;LIU Wenyan;LIU Chenxu;ZHAO Zhibin(School of Mechanical Electronic&Information Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)
出处
《复合材料科学与工程》
CAS
北大核心
2024年第6期118-122,128,共6页
Composites Science and Engineering
关键词
蜂窝结构
梯度浸渍
径向入射
孔向入射
炭黑浸渍
复合材料
cellular structure
gradient impregnation
radial incidence
hole incidence
carbon black impregnation
composites
