Analysis and Optimization of Nonlinear Diode Grids for Shielding of Enclosures With Apertures
| Autor: | Marco De Stefano, Stefano Grivet-Talocia, Christian Schuster, Marc Kopf, Cheng Yang, Christopher Marc Becker, Torben Wendt |
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| Rok vydání: | 2021 |
| Předmět: |
Optimization
Wave propagation Aperture Acoustics Bandpass band-stop Transient analysis nonlinear shielding Apertures field intensity selectivity Electrical and Electronic Engineering Computational modeling diode grids guideline hybrid simulation Integrated circuit modeling Load modeling Switches Electrical impedance Diode Physics Electromagnetic compatibility Condensed Matter Physics Grid Atomic and Molecular Physics and Optics Electromagnetic shielding Intensity (heat transfer) |
| Zdroj: | IEEE Transactions on Electromagnetic Compatibility. 63:1884-1895 |
| ISSN: | 1558-187X 0018-9375 |
| DOI: | 10.1109/temc.2021.3073106 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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