南京航空航天大学学报2024，Vol.56Issue(2)：217-226,10.DOI:10.16356/j.1005-2615.2024.02.003
吸波材料覆盖直升机强散射源RCS缩减分析
RCS Reduction Analysis of Helicopter's Strong Scattering Source Covered with Absorbing Materials
摘要
Abstract
In response to the broadband stealth challenges faced by armed helicopters,this paper proposes a method that utilizes ray-tracing and inverse synthetic aperture radar(ISAR)imaging to pinpoint the locations of strong scattering sources of the helicopter.The paper introduces a conceptual design that integrates electromagnetic metamaterials and magnetic materials into the strong scattering source regions of the helicopter.The stealth effects are calculated and analyzed after incorporating two types of stealth materials onto the helicopter.The paper firstly analyzes the principles of equivalent medium theory,ray-tracing and ISAR imaging.Subsequently,through the calculations of ray-tracing and ISAR imaging,the locations of strong scattering source can be captured accurately and intuitively.Finally,the reflection coefficients of the two types of stealth materials are presented and mono-station radar cross section(RCS)changes are analyzed after materials are loaded on the helicopter.The calculation results show that the two different types of stealth materials can achieve the RCS reduction in the special angular domain after covering part of the helicopter's strong scattering source,providing a reference for the integration design of stealth materials,helicopter skins and main-rotors.关键词
直升机/雷达散射截面/射线追踪/逆合成孔径雷达成像/电磁超构材料/磁性材料Key words
helicopter/radar cross section(RCS)/ray-tracing/inverse synthetic aperture radar(ISAR)imaging/electromagnetic metamaterial/magnetic material分类
航空航天引用本文复制引用
程健来,孔祥鲲,费钟阳,招启军..吸波材料覆盖直升机强散射源RCS缩减分析[J].南京航空航天大学学报,2024,56(2):217-226,10.基金项目
国家自然科学基金(62071227) （62071227）
航空科学基金(20220018052002) （20220018052002）
南京航空航天大学雷达成像与微波光子技术教育部重点实验室开放基金(NJ20220005). （NJ20220005）
