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The multilevel fast multipole algorithm (MLFMA) is very efficient for solving the three-dimensional problems, but for the small size of the complex objects, the memory usage of the multilevel fast multipole algorithm is very large. To overcome this problem, the matrix decomposition algorithm - singular value decomposition (MDA-SVD) is used to alleviate the pressure of the “strong” interaction portion...
The radar cross section of cavities coated with nonuniform plasma is analyzed by using the shooting and bouncing ray (SBR) method in this paper. The curvilinear triangular patches are adopted to model the surface of arbitrarily shaped cavities, so that it can meet the practical needs of engineering. The nonuniform plasma slab used to coat cavities is modeled by a series of subslabs, in which the plasma...
In this paper, the UV method is utilized to reduce both the memory requirement and computational complexity in time-domain combined field integral equation (TD-CFIE) method to analyze scattering from arbitrarily shaped conducting structures. The UV method takes advantage of the rank-deficiency feature and it is kernel-independent. Different orders of weighted Laguerre polynomials are used as temporal...
A multiresolution (MR) basis is presented in electric-field integral equation (EFIE) for analysis of scattering problems. The proposed MR basis functions are constructed as linear combinations of the so called generalized Rao-Wilton-Glisson (gRWG) functions and can be finally represented by linear combinations of the standard RWG basis functions. The MR basis functions can be treated as an extension...
MLFMM augmented with a Green's function interpolation method is proposed to efficiently solve the electromagnetic scattering problems. One well-known shortcoming of the traditional mid-frequency MLFMM method is that the finest box size must be at least 0.25 wavelength to ensure the accuracy. However, there exists a myriad of real targets having fine structure, and it usually produces a large number...
An adaptive integral method based on far-field expansion is introduced to analyze planar microstrip structure. The auxiliary basis functions are constructed as superposition of point-like current elements located on rectangular grids which reproduce the same far field as generated from the original basis functions. Then it is able to employ the fast Fourier transform technique to speed up the matrix...
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