Study of the influence of Carbonyl iron particulate size as an electromagnetic radiation absorbing material in 12.4 to 18 GHz (Ku) Band

Abstract This paper presents the influence of different sizes of carbonyl iron particles on the reflectivity measurements of Radar Absorbing Material (RAM). The electromagnetic characterization was performed with a vector network analyzer and a rectangular waveguide in the frequency range of 12.4 to 18GHz (Ku Band). The influence of different parameters such as thicknesses, particle sizes and concentration of carbonyl iron were evaluated. Reflectivity results showed the influence of these parameters on the performance of the RAM. The best reflectivity values (~ −18 dB) were obtained for samples with 60 wt% concentration and 5 mm thickness. We provide information about significantly reflection loss improvement by simply controlling carbonyl iron particulate size.

摘要：本文研究了不同粒径的羰基铁粒子对雷达吸波材料（Radar Absorbing Material，RAM）反射率测试的影响。实验采用矢量网络分析仪与矩形波导，在12.4至18GHz（Ku波段）的频率范围内对材料的电磁特性进行了表征。本研究评估了厚度、粒径以及羰基铁浓度等多项参数对吸波性能的影响。反射率测试结果表明，上述参数均会对雷达吸波材料的性能产生显著影响。当羰基铁浓度为60 wt%、样品厚度为5 mm时，可获得最优的反射率性能（约-18 dB）。本研究证实，仅通过调控羰基铁颗粒的粒径，即可显著改善雷达吸波材料的反射损耗性能。