Description: Precise scattering problem solving, mixed field integral equation (CFIE), multilevel fast multipole algorithm (MLFMA) and conjugate gradient algorithm (CG) convergence technology. Based on the traditional multilevel fast multilevel sub-algorithm, a detailed study of the impact of the number of nodes on the two-dimensional Lagrange interpolation calculation accuracy, and improved interpolation method in different layers with different interpolation nodes presented in a different layers with different precision control to calculate the number of multi-level sub-patterns analysis of the symmetry of the sparse matrix effects on memory usage as well as the choice of the magnetic field integral equation iterative initial value. Numerical results show that these improvements can greatly improve the computational accuracy and efficiency while reducing memory usage, which can meet the requirements of complex electromagnetic scattering calculation.
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scat.m
scat_coef.m
test_scat.m
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