Summary
International Symposium on Electromagnetic Compatibility
2009
Session Number:23P1
Session:
Number:23P1-1
Modification of FDTD-MAS Method for EMI Estimation with Surrounding Large Objects in Analytical Space
T. Kiso, T. Iwaki, T. Kasuga, H. Inoue,
pp.509-512
Publication Date:2009/7/20
Online ISSN:2188-5079
Summary:
The emissions of electromagnetic interference (EMI) depend on the structures of electrical equipment such as the chassis, cables, printed circuit boards (PCBs), and LSI. In order to predict the EMI emitted by some equipment, it is necessary to create an accurate model of the detailed structure of a radiation source, because the conduction and radiation of EMI depend on the microstructure of the equipment.However, the electromagnetic analysis of a large space with a fine pitch requires considerable time using basic simulation methods such as the finite differential time domain (FDTD) method. The FDTD multiple analysis space (FDTD-MAS) method was proposed to simulate the microstructure (of, for example, PCBs) and surrounding large space efficiently. In the FDTD-MAS method, the small space near a radiation source is calculated by the fine-pitch FDTD method, while the surrounding large space is calculated by the coarse-pitch FDTD method.However, for the use of the FDTD-MAS method, no structures should exist within the surrounding space. We propose a novel simulation method--modified FDTD-MAS--to eliminate thisrestriction. The computational results obtained using the new method are compared with the measured results and the results computed by the original FDTD-MAS method. Keywords: FDTD, FDTD-MAS, Radiation, EMI, Estimation