Abstract
This article presents a wideband phase less source reconstruction method (SRM) for the evaluation of the radiated emissions from printed circuit boards (PCBs) in shielding enclosures. The PCBs are modeled with equivalent dipoles, and the numerical Green's function (NGF) is deployed to establish the relationship between the equivalent source and the input near-field (NF) data, thus the electromagnetic influences of the surrounding environments comprehensively accounted. This method only requires magnitude-only NF scanning over a single plane, thus significantly decreasing the NF measurement difficulty. To remedy the lack of phase information of the NF data, the input NF data are equally divided into two groups with a uniform distribution strategy, and then the phase of NF data can be retrieved via an iterative approach. Moreover, with the objective of improving the convergence of the iterative SRM procedure, the initial phase of the NF data is set as the same as the NGF. In addition, a cubic-spline-algorithm-enhanced adaptive frequency sampling strategy is applied for source reconstruction in a wide frequency band, which avoids repetitively implementing the SRM at every frequency, thus saving a large amount of CPU time. To validate the effectiveness of the proposed wideband phase less SRM, several representative numerical examples are investigated, in which both the NF and the far-field radiated emission are evaluated.
Recommended Citation
Z. Xiao et al., "Modeling Wideband Radiated Emissions From PCBs In Shielding Enclosures Based On Single-Plane Phaseless Near-Field Scanning," IEEE Transactions on Electromagnetic Compatibility, Institute of Electrical and Electronics Engineers, Jan 2024.
The definitive version is available at https://doi.org/10.1109/TEMC.2024.3362960
Department(s)
Electrical and Computer Engineering
Publication Status
Early Access
Keywords and Phrases
Adaptive frequency sampling (AFS); Integrated circuit modeling; Interpolation; Magnetic noise; Magnetic shielding; Noise measurement; numerical Green's function (NGF); phase retrieval; printed circuit boards (PCBs) in shielding enclosure; single-plane phaseless near-field (NF) scanning; Splines (mathematics); Tikhonov regularization; Wideband; wideband phaseless source reconstruction
International Standard Serial Number (ISSN)
1558-187X; 0018-9375
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Institute of Electrical and Electronics Engineers, All rights reserved.
Publication Date
01 Jan 2024
