Abstract
The curve linear–linear (CLL) basis functions are proposed to improve the accuracy of both the magnetic-field integral equation (MFIE) and the combined-field integral equation (CFIE) for electromagnetic scattering from PEC objects. The CLL basis functions are derived first and then the multilevel fast multipole algorithm is applied to accelerate the matrix–vector multiplication. The accuracy of the CLL basis functions for both the MFIE and the CFIE are compared with both the curve RWG basis functions and the linear–linear basis functions. Numerical results demonstrate the efficiency of the proposed method.
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