一种新的雷达目标散射截面宽带和宽角同时外推技术  

A new extrapolation technique of RCS in both angular and frequency domains

作　　者：童创明[1] 高阳[1] 卢燕[1] 苏敏[1] 王金博[1] 

机构地区：[1]空军工程大学导弹学院,陕西三原713800

出　　处：《电波科学学报》2007年第5期790-793,814,共5页Chinese Journal of Radio Science

基　　金：陕西省自然科学基金(2005F23)

摘　　要：雷达散射截面(RCS)既与频率有关又与角度有关。采用矩量法(MOM)结合降维展开格式(RDES)和渐近波形估计技术(AWE),可同时获得单站RCS的频域和角度域特性。首先,建立了关于目标表面电流的电场积分方程(EFIE),并采用MOM将EFIE离散为线性代数方程组;其次,基于RDES技术,可将目标表面电流展开为关于频率与角度及其各阶导数的叠加;再次,基于AWE技术,可快速获取目标表面电流的频域与角度域特性;最后,由目标表面电流计算远区散射场及RCS。本方法至少具有两个明显的优点,其一是能得到RCS的解析表达式,其二是明显降低计算机仿真时间。The radar cross section （RCS） is dependent on both frequency and angle.The method of moments （MOM） in conjunction with both the reduced dimensions explosion styles （RDES） and the asymptotic waveform evaluation （AWE） technique is applied to predict the mono-static RCS of an arbitrarily shaped target both frequency and angular domains simultaneously. The electric field integral quation （EFIE） about the equivalent current on the target surface is firstly built and is discrete as the linear algebraic equations by MOM. The equivalent current secondly added to the function about frequency, angle and their derivatives based RDES technique. The properties of the equivalent current about frequency and an- gle are quickly obtained based on AWE technique. The scattering fields or RCS are eventually computed by the equivalent currents. The method in the paper has at least two significant advantages： one being obtained the analytical formulas of RCS and the other being a significant decrease in the amount of computational time.

关 键 词：雷达散射截面 矩量法 外推技术 降维展开格式 渐近波形估计 

分 类 号：O411[理学—理论物理]