An efficient dual-scale method for analysis of EMI problems resulted from radiation sources

AbstractAn efficient dual-scale method, which integrates parabolic equation (PE) with electric field integral equation (EFIE) formulated via the Rao-Wilton-Glisson moment method (RWG-MOM), is proposed to analyze the electromagnetic interference (EMI) problems resulted from radiation sources. This method is implemented by decomposing the original intractable multi-scale problem domain into two sub-regions: (1) modeling of the complicated ambient electromagnetic fields by PE and (2) solution of the fields coupling to the exposed electronic devices by RWG-MOM. Frequency-sweep and Fourier synthesis techniques are applied to calculate the transient currents and voltages. The proposed method is able to fully model the disturbances of the electromagnetic fields by multi-path effects. Besides, it reduces the memory footprint and the CPU computing time effectively compared to the traditional full-wave electromagnetic methods. Numerical examples are presented, and the simulation results indicate that this method is well suitable for the EMI analysis of external radiation sources.KEYWORDS: Dual-scale methodelectromagnetic interference (EMI)parabolic equation (PE)moment method (MOM)large-scale environment Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsDongmin ZhangDongmin Zhang was born in Hunan Province, China, in 1990. He received a B.E. degree in Electronic Information Science and Technology and a Ph.D. degree in Electromagnetic Field and Microwave Technology from Southwest Jiaotong University, Chengdu, China, in 2015 and 2020, respectively. He is currently an engineer in Southwest China Institute of Electronic Technology. His research interests include computational electromagnetics, electromagnetic environmental evaluation, and radio wave propagation.Cheng LiaoCheng Liao was born in Chongqing, China, in 1964. He received the B.S. and M.S. degrees in optics and the Ph.D. degree in Electromagnetic Field and Microwave Technology from Chengdu University of Electronic Science and Technology, Chengdu, China, in 1986, 1989, and 1995, respectively. From 1997 to 1998, he was a Visiting Scholar at the City University of Hong Kong, Kowloon Tong. He is currently a Professor and the Director of the Institute of Electromagnetic Field and Microwave Technology, Southwest Jiaotong University. His major research interests include antenna theory and design, computational electromagnetic, and electromagnetic compatibility.Xiaochuan DengXiaochuan Deng was born in Sichuan Province, China, in 1990. He received the B.E. degree in Electromagnetic Wave Propagation and Antenna from Chengdu University of Electronic Science and Technology, Chengdu, China, in 2014 and the Ph. D. degree in Electromagnetic Field and Microwave Technology from Southwest Jiaotong University, Chengdu, China, in 2020. He is currently an engineer in Southwest China Institute of Electronic Technology. His research interests include computational electromagnetics and electromagnetic wave propagation.Song FuSong Fu was born in Hubei Province, China, in 1986. He received a Ph.D. degree in Radio physics from Wuhan University, Wuhan, China, in 2015. He is currently an engineer in Southwest China Institute of Electronic Technology. His research interests include electromagnetic environment simulation and evaluation.