目标宽频带RCS的快速算法研究

目标宽带RCS预估算法一直是计算电磁学的一个研究热点，本文分别研究了渐近波形估计技术（AWE）与最佳一致逼近技术在宽频带RCS预估领域内的应用。首先，介绍了传统矩量法计算RCS的原理，并分析了两种快速算法的计算过程。然后，采用这两种技术，分别计算了简易飞机模型的RCS值，并对这两种方法进行比较。计算结果表明相比传统的矩量法，这两种方法在不影响精度的前提下大大提高了计算效率。同时，相比渐近波形估计技术，最佳一致逼近技术在节省内存，节约时间方面更具优势。最后，采用最佳一致逼近理论，结合电磁计算软件，实现较大尺寸目标的宽频带RCS的计算。

Study of fast algorithms of wide-band RCS oftargets

The prediction algorithm of wide-band RCS of targets is always a hot topic in computational electromagnetism. The asymptotic waveform evaluation (AWE) and the best uniform approximation are applied to the prediction field of wide-band RCS of targets in this paper. Firstly, the RCS calculation principle of traditional MoM is introduced, and then the two fast algorithms are analyzed. Secondly, the two methods are compared by calculating wide-band RCS of simple plane model. The result shows that the two methods can improve calculation efficiency significantly without sacrificing much accuracy compared with the traditional MoM. And furthermore, the best uniform approximation has more advantages than AWE on saving memory and time. Finally, the wide-band RCS of larger size target is calculated by using the best uniform approximation combining with electromagnetic computing software.