新型厘米波双层球形微粒电磁特性研究

Study on Electromagnetic Characteristics of a Novel Double-Layer Spherical Particles in Centimeter Wave Band

在厘米波段,当微粒尺寸小于入射波波长时,利用双层球形颗粒的Mie散射理论,研究了双层球形结构的电磁波散射和吸收特性,结果显示内核为磁性材料的双层球微粒,其吸波能力和隐身性能都优于内核为非磁性材料的双层球微粒。在此基础上,数值计算了内层是碳或铁介质,外层为非磁性等离子体的包覆体新型结构,结果表明该结构具有很好的电磁波衰减和吸收特性。

When the particle dimension is smaller than incident wavelength,we discuss the scattering and absorption characteristics of the electromagnetic wave of double-layer spherical shells in centimeter wave band,and results show that the absorbing capacity and stealth of the particle with magnetic kernel are superior to non-magnetic kernel.On this basis,in this paper we design the new structure of which the inner layer is carbon or iron medium,and the outer layer is non-magnetic plasma.The results show that the novel structure has good electromagnetic wave attenuation and absorption capacity.