Abstract
In this paper, an improved analytical model is presented to predict the shielding effectiveness (SE) and resonances of an apertured enclosure composed of the material of finite conductivity. In the model, the modified parameters of the rectangular waveguide are introduced to deal with the lossy enclosure with apertures, which can consider the effects of wall loss on the SE. Firstly, according to the circuit theory and electromagnetic topology (EMT) theory, the lossy enclosure is modeled as the circuit model and signal flow graph, respectively. Then, the electric field components at the monitor point can be obtained; hence, the SE can be predicted accurately. Finally, the presented model is utilized to analyze the effects of various parameters and conditions on the SE. The validity of the presented model is verified by the CST through several cases, showing that the lossy enclosure is feasible to damp all the resonant modes.
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Yanfei Gong
Yanfei Gong was born in Shandong, China, in 1987. He received a Ph.D. degree in electrical engineering from North China Electric Power University, Beijing, China, in 2019, where he is currently a Lecturer with the School of Information and Communication Engineering, Beijing Information Science and Technology University. His main research interests include electromagnetic pulse (EMP) interaction with transmission lines, electromagnetic shielding.
Xingtong Chen
Xingtong Chen was born in Jilin, China, in 1993. She received the B.S. degree in electrical engineering from North China Electric Power University, Baoding, China, in 2016, and the M.S. degree in electronic science and technology from North China Electric Power University, Beijing, China, in 2019. She is currently an engineer with the State Grid Energy Research Institute, Beijing, China. Her main research interests include the Internet of energy, power electronic technology and power system modeling.