摘要
针对半主动导引头对超低空目标的探测问题,引入导引头天线方向图以及照射雷达天线方向图,得到半主动导引头抗击多径干扰的修正“四路径”模型。首先采用高斯方向图来模拟实际雷达天线方向图及导引头天线方向图,构建了修正“四路径”模型;然后采用物理光学法及等效电磁流混合算法(PO+MEC)计算得出不同路径的低空导弹目标的散射回波,通过对四条回波路径进行矢量叠加,得到了目标的回波特性;最后详细分析了不同极化方式与粗糙面表面均方根高度对复反射系数与多径干扰的影响,并进一步分析了不同路径回波的干扰情况以及不同环境下多径干扰随擦地角的变化情况。通过与矩量法对比,验证了PO+MEC混合算法的正确性。
To solve the problem of air-defense seeker detcting super-low altitude target,the antenna radiation pattern of seeker and groud radar are introduced to modify traditional Four Path Method(FPM).Firstly,the Gaussian pattern is introduced to simulate the actual radar antenna pattern,and the modified FPM model is constructed.Next,the PO+MEC hybrid method that combins Physical Optics(PO)and Method of Equivalent Currents(MEC)is used to calculate the electromagnetic scattering characteristics of target in different paths,and the whole scattering propeties of target are obtained by vector superposition of four different paths.Finally,the effects of the polalization mode and the root mean square height of rough surface to multipath interference are calculated and analyzed.Futhermore,multipath interference propeties in different paths and multipath interference changing with grazing angle under different environments are analyzed.Compared with the traditional method of moment(MoM),the PO+MEC hybrid method is proved to be accurate.
作者
王建军
曹泽阳
童创明
田贵龙
Wang Jianjun;Cao Zeyang;Tong Chuangming;Tian Guilong(Air and Missile Defense College,Air Force Engineering University,Xi'an 710051,China;Unit 95100 of the PLA,Guangzhou 510000,China)
出处
《战术导弹技术》
北大核心
2019年第6期42-48,共7页
Tactical Missile Technology
基金
国家自然科学基金(61372033)
关键词
多径干扰
布儒斯特角
半主动导引头
天线方向图
复合散射
导弹
超低空突防
multipath interference
Brewster angle
semi-active seek
antenna radiation pattern
composite scattering
missile
super-low penetration
