Abstract
In this paper, a modified finite-difference time-domain (FDTD) method is proposed for the rapid analysis of a Hertzian dipole source in the low-frequency band. The FDTD technique is one of the most widely used methods for interpreting high-resolution problems such as those associated with the human body. However, this method has been difficult to use in the low-frequency band as the required number of iterations has increased significantly in such cases. To avoid this problem, FDTD techniques using quasi-static assumptions in low-frequency bands were used. However, this method was applied only to plane wave excitation, making it difficult to apply to near-field problems. Therefore, a modified approach is proposed, involving the application of the FDTD technique with a quasi-static approximation to an electric and magnetic dipole problem. The results when using the proposed method are in good agreement with those from a theoretical solution. An example of comparison with the standard FDTD method is shown for illustrating the proposed method’s performance.
Highlights
Discussion inResults this paper described in [18], and the proposed method was modified by applying a quasi-static approximation theHertzian above finite-difference time-domain (FDTD)
The standard FDTD formulation and code used in this paper are described in [18], and the proposed method was modified by apTable 1.aSimulation parameters
The quasi-static FDTD (QS-FDTD) method is extended to Hertzian dipole source excitation problems
Summary
Academic Editors: Ewa Korzeniewska and Mariusz Tomczyk. Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Previous research on the adverse effects of electromagnetic waves has been mainly conducted in the extremely low-frequency band for power transmission lines and the highfrequency band for problems such as mobile phones. Many types of devices have been developed using an intermediate frequency band in the fields of wireless information and wireless power transmission (WPT) [1,2]. As an example of WPT, on-line electric vehicle is being used as an on-campus shuttle bus and is about to be commercialized. The interest in electromagnetic field (EMF) hazards is increasing due to the undesirable
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