| 摘要: |
| 提出了一种快速求解目标宽带RCS的有效方法；方法将超宽带特征基函数法与最佳一致逼近相结合，首先求解出频率最高点处的特征基函数作为超宽带特征基函数，该基函数在每个切比雪夫节点能反复应用，大大节约每个切比雪夫节点处电流的求解时间，然后利用最佳一致逼近便可很快得到带宽内所有频点的电流分布信息，由此达到快速求解目标宽带RCS的目的；与传统超宽带特征基函数法相比，计算效率有了明显的提升，数值计算结果证实了该方法的精确性与有效性。 |
| 关键词: 特征基函数法 最佳一致逼近 宽带雷达散射截面 矩量法 |
| DOI： |
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| Fast Calculation of Wide band RCS of Objects Using Ultra wide Band Characteristic Basis Function Method |
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WANG Qiang， WANG Zhong gen， ZHANG Yong gang
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| Abstract: |
| An efficient numerical approach is presented to accelerate the solution of the wide band electromagnetic scattering characteristics using the ultra wide band characteristic basis function method （UCBFM） with the best uniform approximation.The ultra wide band characteristic basis functions （UCBFs） are obtained at the highest frequency point，these UCBFs can be reused for each node of Chebyshev，so the time of calculating the surface electric currents at these nodes can be greatly saved.Then，the electric current distribution can be obtained at any frequency within the given frequency range by using the best uniform approximation，which is used to compute the scattered fields and the wide band radar cross section （RCS）.The accuracy and efficiency are improved significantly compared with the traditional ultra wide band characteristic basis function method （UCBFM）.Numerical results demonstrate that the proposed method is accurate and effective. |
| Key words: characteristic basis function method best uniform approximation wide band RCS method of moments（MoM） |
