Shielding effectiveness measurement and simulation of small perforated shielding enclosure using FEM

Kubik, Zdenek; Skála, Jiří

doi:10.1109/eeeic.2015.7165478

Cited by 13 publications

(8 citation statements)

References 12 publications

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“…Similarly, substituting (9) into (11), the total vector magnetic potential can be expressed as (see (15)) where…”

Section: Electric Fields In the Shielding Enclosurementioning

confidence: 99%

“…Time‐domain methods such as finite‐difference time‐domain method [10, 11 ] and transmission‐line matrix method [12, 13 ], have the advantage of high‐computational efficiency, which are suitable for wideband analysis. Frequency‐domain methods such as the method of moments (MoM) [14 ] and finite element method [15 ], possess higher accuracy in predicting the shielding performance of an apertured enclosure, which are suitable for narrowband analysis. Though the mentioned‐above numerical methods can readily model the complex enclosure structures and obtain accurate shielding effectiveness (SE) results, but take a lot of computing time and computational resources.…”

Section: Introductionmentioning

confidence: 99%

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Efficient method for the shielding effectiveness of an enclosure with electrically large apertures based on the Cohn model and mirror procedure

Gong

Jiang

2020

IET sci. meas. technol.

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An efficient analytical method based on the Cohn model and mirror procedure is proposed for the prediction of the shielding effectiveness (SE) of a rectangular enclosure with electrically large apertures. Firstly, the coupled electromagnetic fields are represented by the equivalent dipole moments located at the centre of the aperture according to the Cohn model, where the dipole moments can be calculated based on the mirror procedure. Then, the vector potentials can be obtained through the relation between the dipole moments and the current distribution. Finally, the total electric fields are obtained by using the vector potentials, thus the SE and most of the resonant modes can be predicted accurately and fast. The SE results which have been verified by the CST over a wide frequency band of 0.01–3.0 GHz show that the proposed method is effective in handling the enclosure with electrically large apertures, including the multiple apertures arranged in different ways and hybrid apertures in different shapes and dimensions.

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“…Similarly, substituting (9) into (11), the total vector magnetic potential can be expressed as (see (15)) where…”

Section: Electric Fields In the Shielding Enclosurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficient method for the shielding effectiveness of an enclosure with electrically large apertures based on the Cohn model and mirror procedure

Gong

Jiang

2020

IET sci. meas. technol.

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“…In the time domain setting, the finite difference time domain method (FDTD) is prominent and has been considered, for example, in Georgakopoulos et al (2001) and Jiao et al (2006). For simulations in the frequency domain, the method of moments (MoM) (Araneo and Lovat, 2009), the finite element method (FEM) (Kubík and Skála, 2015; Carpes et al , 2000; Boubekeur et al , 2014) or transmission line models (TLM) (Carpes et al , 2000; Nie et al , 2011) are common. The cited works above mainly focus on shieldings with a single or few apertures.…”

Section: Introductionmentioning

confidence: 99%

Domain decomposition and upscaling technique for metascreens

Leumuller

Hollaus

Schöberl

2022

COMPEL

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Purpose This paper aims to consider a multiscale electromagnetic wave problem for a housing with a ventilation grill. Using the standard finite element method to discretise the apertures leads to an unduly large number of unknowns. An efficient approach to simulate the multiple scales is introduced. The aim is to significantly reduce the computational costs. Design/methodology/approach A domain decomposition technique with upscaling is applied to cope with the different scales. The idea is to split the domain of computation into an exterior domain and multiple non-overlapping sub-domains. Each sub-domain represents a single aperture and uses the same finite element mesh. The identical mesh of the sub-domains is efficiently exploited by the hybrid discontinuous Galerkin method and a Schur complement which facilitates the transition from fine meshes in the sub-domains to a coarse mesh in the exterior domain. A coarse skeleton grid is used on the interface between the exterior domain and the individual sub-domains to avoid large dense blocks in the finite element discretisation matrix. Findings Applying a Schur complement to the identical discretisation of the sub-domains leads to a method that scales very well with respect to the number of apertures. Originality/value The error compared to the standard finite element method is negligible and the computational costs are significantly reduced.

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“…In recent years, highly integrated circuits and high‐operating frequencies have made the electromagnetic compatibility (EMC) a major issue . Among the EMC topics, shielding is a prominent one and there is an outstanding trend to study its different aspects nowadays . The inevitable need for the air ventilations, input/outputs, and other means of connections between either sides of the shields result in designing apertures and slots.…”

Section: Introductionmentioning

confidence: 99%

“…Frequency domain methods are suitable for steady‐state analysis and highly resonant structures . Method of moments and finite element method are the 2 most used methods for estimating SE. These numerical methods are accurate and appropriate for defining some shielding hints.…”

Section: Introductionmentioning

confidence: 99%

Using a network of ports for shielding effectiveness optimization of an enclosure with arbitrary shape apertures

Shourvarzi

Joodaki

2018

Int J Numerical Modelling

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A network of ports will be used to determine the optimized locations and geometries for arbitrary shape apertures on a metallic enclosure. This approach benefits from S-parameter analysis and circuit theory for the description of the shielding. An analytic discussion will show the validity of the new method, which is based on a recently published paper. The consistency of the results for case studies solved by this port network with both literature and 3-D full-wave computed results will show the practicality of the proposed method. The positive effect of symmetry is a major outcome of the case study discussed here. Although the method is theoretically verified here, it can be easily implemented as a simple and reliable shielding effectiveness measurement method.The proposed method obliterates the limits of the traditional simulation and experimental methods as it has no dimensional limits and no need for antennas, shielded rooms, reverberation chambers, etc.

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Shielding effectiveness measurement and simulation of small perforated shielding enclosure using FEM

Cited by 13 publications

References 12 publications

Efficient method for the shielding effectiveness of an enclosure with electrically large apertures based on the Cohn model and mirror procedure

Efficient method for the shielding effectiveness of an enclosure with electrically large apertures based on the Cohn model and mirror procedure

Domain decomposition and upscaling technique for metascreens

Using a network of ports for shielding effectiveness optimization of an enclosure with arbitrary shape apertures

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