Publisher DOI: 10.1109/TEMC.2021.3073106
Title: Analysis and Optimization of Nonlinear Diode Grids for Shielding of Enclosures With Apertures
Language: English
Authors: Yang, Cheng 
Wendt, Torben 
De Stefano, Marco 
Kopf, Marc 
Beck, Christopher 
Grivet-Talocia, Stefano 
Schuster, Christian 
Keywords: Apertures; band-stop; Bandpass; Computational modeling; diode grids; field intensity selectivity; guideline; hybrid simulation; Integrated circuit modeling; Load modeling; nonlinear shielding; Optimization; Switches; Transient analysis
Issue Date: 1-Dec-2021
Source: IEEE Transactions on Electromagnetic Compatibility 63 (6): 1884-1895 (2021-12-01)
Abstract (english): 
Lumped-element grids provide an attractive option for wave propagation control in electromagnetic compatibility (EMC) engineering. This article investigates the peak shielding effectiveness (SE) of a diode grid used for protection of enclosures with apertures against high-intensity radiation fields (HIRFs). The nonlinearly loaded aperture is investigated with an efficient hybrid field-circuit simulation approach. Numerical experiments show that design aspects, e.g., aperture and enclosure size, grid density, impedance characteristic of lumped loads, play an important role in the field transmission through a diode grid which is nonlinear and time-variant. With a physics-based analysis of the interaction between the grid and the enclosure-backed aperture, nonlinear shielding techniques are identified that allow a control of the peak SE between 0 and 26 dB in novel ways. For the first time, the peak SE curve of a diode grid is demonstrated with four different field intensity dependencies, i.e., intensity low-pass, intensity high-pass, intensity bandpass, and intensity band-stop selectivities from tens V/m to hundreds of V/m. By considering design aspects into a two-step optimization procedure, practical guidelines are provided for the nonlinear shielding implementation.
ISSN: 0018-9375
Journal: IEEE transactions on electromagnetic compatibility 
Institute: Theoretische Elektrotechnik E-18 
Document Type: Article
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