Abstract：A new hybrid method based on the generalized network principle is proposed to deal with the electromagnetic scattering of a large body with cracks.Using the equivalence theorem,the total scattered field can be regarded as the summation of two parts,the scattering of the large body and that of the cracks.The former is calculated by using iterative physical optical (IPO) method directly and the latter can be computed as follows:First,the admittance matrix of the crack is extracted by using the FDTD method,thus the generalized network representation of the crack can be set up on the aperture.Then the equivalent magnetic current on the crack aperture can be computed by network principles.According to the reciprocity theorem,the scattering from the crack can be obtained finally.Some numerical results show the feasibility and efficiency of the proposed method.
2000, Vol. 22 
