✦ LIBER ✦

A new look at FDTD excitation sources

✍ Scribed by Tao Su; Wenhua Yu; Raj Mittra

Publisher: John Wiley and Sons
Year: 2005
Tongue: English
Weight: 519 KB
Volume: 45
Category: Article
ISSN: 0895-2477
DOI: 10.1002/mop.20770

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

In FDTD simulations, the excitation sources can be divided into two categories: (i) the displacement‐current source, which is generated by a time‐varying electric field; (ii) the induced‐current source, which exists in the lossy material. Currently, the latter source is the popular choice in most FDTD simulations. However, there are two problems with the use of this source: the time signal shape at the observation points is different from that of the input pulse, and an artificial DC component is introduced into the solution that prevents the solution from converging to zero. The objective of this paper is to investigate these excitation sources and to clarify some concepts in FDTD simulations. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 45: 203–207, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20770

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