Internal stirring: an approach to approximate evaluation of shielding effectiveness of small slotted enclosures

Rusiecki, Andrzej; Aniserowicz, K.; Duffy, Alistair; Orlandi, Antonio

doi:10.1049/iet-smt.2016.0060

Cited by 8 publications

(7 citation statements)

References 30 publications

(73 reference statements)

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“…Since in the reverberant case, the power density is assumed to be uniform in space and isotropic, in that equal energy travels in every direction with every polarisation, the position of the aperture and contents does not matter. Substituting (8)- (10) into (7) we get:…”

Section: A the Power Balance Methodsmentioning

confidence: 99%

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On the Meaning of Enclosure Shielding Effectiveness

Dawson

Marvin

Robinson

et al. 2018

2018 International Symposium on Electromagnetic Compatibility (EMC EUROPE)

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This paper presents some thoughts on the meaning of shielding effectiveness (SE) for a real enclosure. It is demonstrated that the conventional measurement of SE is a value specific to the particular measurement and is not necessarily representative of the enclosure in any practical situation, including a different measurement. The SE of an enclosure depends both on the enclosure contents, including the measurement antenna and the effective transmission crosssection of the energy coupling mechanisms such as apertures, penetrations, seams and diffusion through walls.

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Section: A the Power Balance Methodsmentioning

confidence: 99%

“…The power flow into the enclosure can be computed from the power balance (7). The transmission cross-sections can then be computed from the known power flow and power densities as using (8) and (9).…”

Section: B Application Of Power Balancementioning

confidence: 99%

On the Meaning of Enclosure Shielding Effectiveness

Dawson

Marvin

Robinson

et al. 2018

2018 International Symposium on Electromagnetic Compatibility (EMC EUROPE)

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“…In recent years, considerable attention has been paid to the study of shields that take into account their internal filling [18][19][20][21]. New methods of SE measurements [22,23] and calculations [24][25][26][27] have been developed for such structures. Several methods for SE improvement using an internal filling of shields have also been proposed [28,29].…”

Section: Introductionmentioning

confidence: 99%

On Symmetry and Asymmetry in Nested Electromagnetic Shields

et al. 2023

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This work focuses on the study of shield systems consisting of nested enclosures. In the first step, using FDTD simulations and measurements in an anechoic chamber, we investigate the shielding effectiveness (SE) of the system of two nested rectangular enclosures in the frequency range of up to 3 GHz. It is shown for the first time that for a number of frequencies, the SE of the nested shields can be improved by 40–50 dB due to the asymmetric arrangement of the enclosures, their electrical connection, and the mutually perpendicular arrangement of the apertures. Next, we analyze the emissions from the electromagnetic radiation sources in the presence and absence of a nested shield system. The results show that a nested shield system may not attenuate the emission amplitude but increases it by more than 58 dB at the resonant frequencies of the enclosures. Then, we prove that a single enclosure can have a higher SE than the same enclosure as a part of a poorly designed nested shield system. The final part of the article formulates practical recommendations for the design of nested shield configurations.

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“…Способность таких конструкций ослаблять уровень помех характеризуется эффективностью экранирования (ЭЭ), зависящей не только от электрофизических параметров материала ЭК, но и от её геометрических размеров, формы, внутреннего заполнения и т.п. [1][2][3].…”

Section: Introductionunclassified

Experimental Setup for Shielding Effectiveness Measurements of Small-Sized Enclosures

Ivanov¹,

Komnatnov²

2022

JRE

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This paper presents the results of creating an experimental setup for shielding effectiveness (SE) measurements of small-sized enclosures. A functional diagram of the setup was developed. A prototype of the setup software and measuring equipment were created. Using the developed experimental setup, test measurements of the SE for a typical rectangular enclosure were performed. It is shown that in the frequency range from 10 MHz to 1 GHz, the frequency dependences of SE obtained using the developed setup, anechoic chamber, analytical and numerical methods, are in good agreement. The average value of the absolute error does not exceed 5.4 dB.

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Internal stirring: an approach to approximate evaluation of shielding effectiveness of small slotted enclosures

Cited by 8 publications

References 30 publications

On the Meaning of Enclosure Shielding Effectiveness

On the Meaning of Enclosure Shielding Effectiveness

On Symmetry and Asymmetry in Nested Electromagnetic Shields

Experimental Setup for Shielding Effectiveness Measurements of Small-Sized Enclosures

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