期刊论文

Scattering characteristics of targets in resonant region and diffraction mechanism of curved surface

Huang, Q.

中文

电波科学学报

1005-0388

2019

34

1

104-110

10.13443/j.cjors.2018072601

61571333:国家自然科学基金 61301061:国家自然科学基金

本校为其他机构

针对目标在谐振区的散射模型,提出了将高频方法应用于谐振区的两种改进办法,用以解决高频方法在谐振区精确度有所下降的问题.在谐振区,随着频率和目标电尺寸的降低,对于表达式中的高频级数解,需要更多的求和项才能使级数得以收敛,除此之外还考察了高阶爬行波对散射场的影响.在此基础上,为了分析谐振区的散射特性与散射机理,将混合几何光学-物理光学算法与一致性几何绕射理论相结合,同时推导了爬行波随爬行距离等参数衰减的表达式,并且通过计算金属球和二维圆柱的散射场,总结出目标在谐振区的散射特性.

Aiming at the scattering model of the target in the resonance region, two improved methods for applying the high frequency method to the resonance region are proposed to solve the problem that the accuracy of the high frequency method is reduced in the resonance region. In the resonance region, along with the frequency and the reduction of the target electrical size, the high-frequency series solution in the expression requires more summation terms to make the series converge, in addition to the influence of high-order creeping waves on the sca...