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In this paper, a method based on consecutive perturbation for the fast and accurate extraction of all useful surface- and leaky-wave modes for a lossy layered medium is proposed. The algorithm consists of two perturbation stages. In the first stage, according to the relationship for the frequency variation between the surface- and leaky-wave modes, the leaky-wave modes for a lossless medium can be...
The multilevel fast multipole algorithm (MLFMA) has been used in calculating electromagnetic scatterings from electrically large objects. The octree structure plays an important role in the MLFMA. However, in the multi-resolution case, a single octree structure may produce a larger near-field matrix. In this paper, in order to overcome this shortcoming to a certain extent, a hybrid tree structure...
In this paper, the distance between source and field points is divided into ultra-near field region, near field region and far field region for fast and accurately calculating the spatial Green's function. The spatial Green's functions within the three regions are respectively calculated by the Langrage interpolation scheme, the DCIM with surface wave poles being extracted and the SDP with leaky wave...
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