A Novel Desensitization Using Resonance Suppressors in Metallic Shielding

Chan, Hao-Wei; Wu, Ruey-Beei

doi:10.1109/tcpmt.2019.2926802

Cited by 2 publications

(2 citation statements)

References 18 publications

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“…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%

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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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Section: Introductionmentioning

confidence: 99%

“…Try to use a standard approach that involves reducing aperture sizes in order to reduce electromagnetic coupling in the nested shield system. At resonance frequencies, electromagnetic coupling between nested shields can be reduced by using radar-absorbing materials [20], lossy dielectrics [19], or band-stop frequency selective structures [29].…”

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confidence: 99%

On Symmetry and Asymmetry in Nested Electromagnetic Shields

et al. 2023

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Analytical model of a shielding enclosure populated with arbitrary shaped dielectric obstacles

Ivanov

Komnatnov

2021

J. Phys.: Conf. Ser.

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This paper proposes a new analytical model for an approximate evaluation of the shielding effectiveness (SE) for an enclosure populated with arbitrary shaped dielectric obstacles. The model is based on the enclosure equivalent circuit method proposed by Robinson et al. Dielectric obstacles are taken into account in the calculation of the characteristic impedance and the propagation constant for each regular part situated along the enclosure length. To do this, the model uses the effective value of relative permittivity, which is determined in the cross section of each regular part from a simple percentage ratio. Using the proposed model and the finite element method, the SE calculations were performed for three typical enclosures populated with different dielectric obstacles. The obtained results are in good agreement, and the average value of the absolute error does not exceed 4.4 dB.

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A Novel Desensitization Using Resonance Suppressors in Metallic Shielding

Cited by 2 publications

References 18 publications

On Symmetry and Asymmetry in Nested Electromagnetic Shields

On Symmetry and Asymmetry in Nested Electromagnetic Shields

Analytical model of a shielding enclosure populated with arbitrary shaped dielectric obstacles

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