A Novel Shielding Effectiveness Matrix of Small Shield Cans Based on Equivalent Dipole Moments for Radio-Frequency Interference Analysis

A definition of a shielding effectiveness (SE) matrix for small shield cans used to suppress intra-system noise coupling in mobile devices is proposed. Assuming shield cans enclosing a noise source can be modeled as equivalent dipole moments along with integrated circuits (ICs), a new SE matrix for...

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Bibliographic Details
Published in:IEEE transactions on electromagnetic compatibility 2016-06, Vol.58 (3), p.766-775
Main Authors: Hwang, Chulsoon, Lim, Jae-Deok, Cho, Gyu Yeong, Park, Hark-Byeong, Park, Hyun Ho
Format: Article
Language:English
Subjects:
Cans
Coupling
Couplings
Dipole moment
Equivalence
Equivalent dipole moments
Integrated circuits
Interference
Magnetic moments
Magnetic noise
Magnetic shielding
Noise
Probes
radio-frequency interference (RFI)
shield can
shielding effectiveness (SE) matrix
Shields
TEM cells
Transmission line matrix methods
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Summary:A definition of a shielding effectiveness (SE) matrix for small shield cans used to suppress intra-system noise coupling in mobile devices is proposed. Assuming shield cans enclosing a noise source can be modeled as equivalent dipole moments along with integrated circuits (ICs), a new SE matrix for radio-frequency interference analysis is defined as a ratio of equivalent dipole moments with and without a shield can. The equivalent dipole moments are experimentally extracted using a GTEM cell and two types of probes (monopole and loop), which mimic well the radiations of ICs. Furthermore, the estimation of suppression of noise coupling to an antenna using the proposed SE matrix is successfully validated through numerical simulations.
ISSN:0018-9375
1558-187X
DOI:10.1109/TEMC.2016.2536139