Jauman吸收体的吸波特性  

Electromagnetic absorbing properties of Jauman absorber

作　　者：姜晓文 黄大庆 张昳 史有强 王智勇 JIANG Xiaowen;HUANG Daqing;ZHANG Yi;SHI Youqiang;WANG Zhiyong(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095

出　　处：《航空材料学报》2021年第3期133-138,共6页Journal of Aeronautical Materials

摘　　要：为研究Jauman吸收体的吸波特性,采用有机导电涂层材料和聚氨酯泡沫作为电阻屏和隔离层材料,测试电阻屏和隔离层泡沫的电磁参数,首先研究Salisbury屏吸波特性,包括不同电阻屏厚度对电磁波输入阻抗、反射系数以及反射率的影响,然后计算双电阻屏Jauman吸收体输入阻抗,以及电阻屏厚度对Jauman吸收体反射系数的影响。结果表明:在Salisbury屏第一层厚度不变的情况下,随着第二层厚度增加,材料反射率呈现先降低后升高的规律。对于双屏Jauman吸收体,当第二层厚度为72μm,第四层厚度为11μm时,反射系数绝对值|Γ|最小值为0.00157,吸波性能最优。双屏Jauman吸收体反射率小于–10dB的带宽达到13.1 GHz,Salisbury屏反射率小于–10dB的带宽为9.1 GHz,表明双屏Jauman吸收体吸收带宽明显大于Salisbury屏吸收体吸收带宽。In order to study the absorbing properties of Jauman absorber, organic conductive coating material and polyurethane foam were used as resistive screen and isolation layer material respectively. The electromagnetic parameters of the resistive screen and the isolation foam material were tested. Firstly, the absorbing characteristics of Salisbury screen, including the influence of thickness of different resistance screens on the input impedance, reflection coefficient and reflectivity of the electromagnetic wave were studied, and then the input impedance and the influence of the thickness of the resistive screen on the reflection coefficient of the double-screen Jauman absorber were studied. The results show that when the thickness of the first layer of Salisbury screen is constant, the reflectivity of the material first decreases and then increases with the increase of the thickness of the second layer. For the double-screen Jauman absorber, when the thickness of the second layer is 72 μm and the thickness of the fourth layer is 11 μm,the absolute value |Γ| of the reflection coefficient is 0.00157, and the absorbing performance is the best. The bandwidth of reflectivity of double-screen Jauman absorber less than -10 dB is 13.1 GHz, and that of Salisbury screen less than-10 dB is 9.1 GHz, indicating that the bandwidth of double-screen Jauman absorber is significantly larger than that of Salisbury screen absorber.

关 键 词：Jauman吸收体 输入阻抗 SMITH圆图 Salisbury屏 吸波材料 

分 类 号：TB34[一般工业技术—材料科学与工程]