面向表面行波散射抑制的阻抗调制变量分析  

Analysis of impedance modulation variables for surface travelling wave scattering suppression

作　　者：包家昕 钟小丹 崔浩 BAO Jiaxin;ZHONG Xiaodan;CUI Hao(Shenyang Aircraft Design&Research Institute,Shenyang 110035,China)

机构地区：[1]沈阳飞机设计研究所,辽宁沈阳110035

出　　处：《电子元件与材料》2025年第1期9-14,共6页Electronic Components And Materials

基　　金：国家自然科学基金-联合基金重点项目资助(U2241206)。

摘　　要：针对传统雷达散射吸波材料存在低频性能差、重量大、环境适应性差等问题,在材料不连续处添加渐变阻抗结构可以作为一种抑制表面行波散射的方法。通过建立金属与空气分界面的电磁模型,比较了在分界面处引入渐变阻抗结构前后的雷达散射情况,分析了渐变阻抗结构对金属与空气分界面的行波散射的影响;系统地研究了宽频段内水平极化入射电磁波阻抗调制变量对表面行波散射的抑制效果,并对其规律进行了总结。电磁仿真计算结果表明:雷达散射截面在大范围的入射角度以及0.6~15 GHz的宽频段内实现了缩减,尤其是在行波散射峰值角度处,缩减效果显著,最高可达23.72 dB。该研究结果为飞机表面行波散射的抑制提供了理论依据和参考。To address the problems of poor low-frequency performance,high weight,and limited environmental adaptability of traditional radar absorbing materials,the introduction of graded impedance structures at material discontinuities was proposed as a means to suppress surface traveling wave scattering.By establishing an electromagnetic model of the metal-air interface,the radar scattering characteristics before and after incorporating a graded impedance structure at the interface were compared,and the impact of the graded impedance structure on traveling wave scattering at the metal-air boundary was analyzed.A systematic study was carried out on the effect of impedance modulation variables on the suppression of surface traveling wave scattering over a wide frequency band for horizontally polarized incident electromagnetic waves,and the underlying patterns were summarized.Electromagnetic simulation results demonstrated a reduction in the radar cross section(RCS)over a wide range of incidence angles and within a broad frequency band from 0.6 GHz to 15 GHz.Notably,the reduction was particularly significant at the peak angle of traveling wave scattering,reaching up to 23.72 dB.These findings provide a theoretical basis and effective reference for the suppression of surface traveling wave scattering on aircraft surfaces.

关 键 词：雷达散射截面 渐变阻抗 表面行波 散射抑制 

分 类 号：TN04[电子电信—物理电子学]