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Telecommunications and Radio Engineering

ISSN Print: 0040-2508
ISSN Online: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v54.i3.40
pages 24-31

The FD-TD Method for the Analysis of Electromagnetic Wave Scattering from an Object Moving Parallel to the Incident Wave

Michiko Kuroda
Department of Information Networks, Tokyo University of Technology Scientific
Shigeaki Kuroda
Department of Mechanical Engineering and Intelligent Systems, The University of Electro-Communications


This paper presents a new numerical procedure for solving the electromagnetic field from a moving body. A novel numerical procedure of grid generation having a coordinate line coincident with an arbitrarily shaped moving boundary or moving body is described. It is the key feature of this method that the time factor is added to the conventional numerical grid generation. The time dependent curvilinear coordinate system which coincides with a contour of moving boundary in a physical region is transformed into a fixed rectangular coordinate system. In a simple case, it is possible to choose the function between the physical region and the rectangular computational region. The FD-TD algorithm is exactly solved in this fixed rectangular coordinate system. In this paper, to apply the FD-TD algorithm for this method, the stability criterion in three dimensions is derived. A numerical approach for the analysis of electromagnetic field by a dielectric body moving parallel to the incident wave are described. For a rotating case, a transformation method are described. We are treating this method for a quasi-stationary field. Some numerical results are compared with the analytical ones and excellent agreements between them are obtained.