研究了一种双正交时域多分辨方法，用于分析三维目标的电磁散射特性，计算目标的雷达散射截面.以具有紧支撑和严格内插特性的双正交Cohen-Daubechies-Feauveau(CDF)小波为场量展开的空间基函数，用小波Galerkin采样方法进一步导出该算法的严格三维计算公式，并分析其色散特性. 采用各向异性完全匹配层截断计算空间，应用总场/散射场技术引入入射波. 理论分析和实验结果表明，与时域有限差分法和基于非紧支撑的Battle-Lemarie (B-L)小波的MRTD方法相比，该方法在保持计算精度的前提下能大幅度节省计算资源.

 We study a biorthogonal multiresolution time-domain (bi-MRTD) method and use it to analyze electromagnetic scattering properties and compute radar cross sections (RCS) of three-dimensional objects. Compactly supported biorthogonal Cohen-Daubechies-Feauveau(CDF) wavelets with rigorous interpolation property are employed as spatial basis functions to expand the field components. A rigorous three-dimensional calculation formula is derived by applying the wavelet-Galerkin sampling method. Dispersion properties of the bi-MRTD methods are studied. Anisotropic perfectly-matched layer (APML) is chosen to truncate the computational space. The incident wave is introduced by using the total-field/scattered-field (TF/SF) technique. Theoretical analyses and experimental results show that the bi-MRTD method can save considerable computational resources without loss of accuracy in comparison with FDTD and the MRTD method based on non-compactly supported Battle-Lemarie (B-L) wavelets.