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Summary form only given. Commercial EM simulation softwares are invaluable tools without which the engineers, who are engaged in designing antennas, microwave circuits, RF packages, and systems utilizing these devices, simply cannot survive. This is because the number of real-world problems that we can solve by using analytical techniques is very limited indeed. To be sure, the commercial software...
Generally speaking, it is assumed that the smaller the size of the FDTD (finite difference time domain) cell, the better the result will be. In this communication, we show that the shape of the computational domain can significantly influence the accuracy of the results in the FDTD simulation. Specifically, an improper choice for the domain shape can dramatically degrade the FDTD results even if we...
In this work we present a novel approach to constructing the layered medium Green's function using the BOR (body of revolution) version of the FDTD, which has several desirable attributes: (a) It poses no difficulty when handling n-layer problems, even when n is large; (b) it is easy to analyze lossy layers, including RAM materials; (c) the location of the observation point can be arbitrary in terms...
In this paper we use the spectral finite difference time domain (SFDTD) to analyze patch-type frequency selective surface illuminated by an oblique angle of incidence. The results are compared with those obtained by using the method of moments (MoM) and the split-field FDTD technique
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