Implementation and Adjustment of CPML for CE-FDTD Algorithm
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2014, Vol 38, Issue 38
Abstract
A complex-envelope finite difference time domain (CE-FDTD) algorithm has been proposed in the literature as one of FDTD formulations that is very general. However, this method, didn’t receive a lot of scientific attention, since the introduced complexity wasn’t quite justified by the obtained gain in maximum time step size. Nevertheless, there is still a strong motivation to study this formulation, since it can potentially be, in combination with high order accuracy FDTD approaches, a significant tool to combat the accuracy deterioration due to numerical dispersion. A method of choice for termination of CE-FDTD computational domain was the convolutional perfectly matched layer (CPML), since it is considered to be superior over other commonly used techniques. Yet, the application of CPML in CE-FDTD environment isn’t straightforward. In this paper a modification of conventional CPML is performed in order to be used for termination of CE-FDTD computational domain. The modified CPML, along with CE-FDTD algorithm has been implemented in an own developed simulation environment and tested through various simulation cases. The functionality of the proposed CPML is illustrated on the example of a dipole antenna. The observed behavior of the boundary region fully corresponds to the propagation through the free space, without any undesirable reflections.
Authors and Affiliations
Bojana Nikolic, Bojan Dimitrijevic, Slavoljub Aleksic, Nebojsa Raicevic, Zorica Nikolic
Keywords
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