Shielding effectiveness of a rectangular enclosure with finite wall thickness and rectangular apertures by the generalised modal method of moments

Dehkhoda, Parisa; Tavakoli, A.; Moini, R.

doi:10.1049/iet-smt:20080036

Cited by 19 publications

(36 citation statements)

References 13 publications

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“…andG m (x, y, z/x , y , z ) is the Green's function of each region [24]. By enforcing the tangential magnetic field boundary condition at each side of an aperture, two sets of integral equations for the magnetic currents of each aperture are derived.…”

Section: Generalized Modal Mom Techniquementioning

confidence: 99%

“…Further validation is performed by comparing the results of the newly proposed circuit technique with the GMMoM [24]. A 50 cm cubic enclosure with various numbers of 4 cm square apertures and 5 mm thickness is examined.…”

Section: Comparison With the Gmmommentioning

confidence: 99%

“…The modal MoM technique in [23] can be generalized to include the wall thickness in a SE calculation of a perfect electric conductor box with rectangular apertures [24]. It is assumed that apertures are small enough so that image theory can be applied.…”

Section: Generalized Modal Mom Techniquementioning

confidence: 99%

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Fast Calculation of the Shielding Effectiveness for a Rectangular Enclosure of Finite Wall Thickness and With Numerous Small Apertures

Dehkhoda¹,

Tavakoli²,

Moini³

2008

PIER

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Abstract-In this paper, an extremely fast technique is introduced to evaluate the shielding effectiveness of a rectangular enclosure of finite wall thickness and numerous square or circular small apertures subject to a normally incident plane wave. The technique is based on the traditional waveguide circuit model where the enclosure is replaced with an equivalent shorted transmission line. In the proposed circuit model, the perforated thick wall is represented by an equivalent impedance which is derived from the reflection coefficient. The computation results are in very good agreement with measurements. Additionally, further results are compared to a generalized modal MoM technique which are in excellent agreement as the number of apertures increase. Besides accuracy, the method is extremely efficient and easy to implement compared to the numerical techniques.

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Section: Generalized Modal Mom Techniquementioning

confidence: 99%

Section: Comparison With the Gmmommentioning

confidence: 99%

See 1 more Smart Citation

Fast Calculation of the Shielding Effectiveness for a Rectangular Enclosure of Finite Wall Thickness and With Numerous Small Apertures

Dehkhoda¹,

Tavakoli²,

Moini³

2008

PIER

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“…According to Reference [17], the xx-and yy-components of G m (r, r ) in Equation (11) can be written as (13) where (m , n )are the mode index numbers of the region II; k xm = m π/x e , k yn = n π/y e , and…”

Section: Electromagnetic Leakage Fields In Region IImentioning

confidence: 99%

“…The small aperture model is reliable in terms of calculation accuracy but restricted to the condition that the size of the aperture is shorter than 1/10 wavelength of interest and that the thickness of the enclosure is neglected. In order to overcome these limitations, Dehkhoda et al [17] have introduced a generalized model MoM to evaluate the SE of an apertured enclosure with an finite wall thickness exposed to a plane wave of normal incidence. In this method, the unknown magnetic currents at both sides of the rectangular aperture are represented by the sinusoidal basis functions.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Model for Electromagnetic Leakage From an Apetured Complex Metallic Enclosures

Gong¹,

Hao²,

Jiang³

et al. 2017

PIER B

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Abstract-An efficient and accurate hybrid model has been developed for the electromagnetic leakage from two apertured cascaded metallic rectangular enclosures connected by a metallic plate with an aperture covered by a non-magnetic conductive sheet excited by an electric dipole located in the enclosure. The leakage fields through the covered aperture are derived by using the dyadic Green's function and employing the approximate boundary conditions at both sides of the sheet which is regarded as an infinite conductive plate. Then, the leakage fields into the external space through the aperture regardless of its thickness at the end of the enclosure are derived based on a generalization of the method of moments (MoM). Finally, the shielding effectiveness (SE) at the target points outside the enclosure is calculated for the intermediate analysis of the leakage fields. Comparison with the full wave simulation software CST has verified the model over a wide frequency band. The hybrid model then is employed to analyze the effect of different factors including the thickness and the conductivity of the conductive sheet on the SE, and the corresponding physical mechanisms of the leakage fields are also illuminated. The hybrid model can also be extended to deal with other cases, including the whole plate made of non-magnetic conductive material without apertures, the infinite thickness of the aperture at the end of the enclosure, and the aperture at the end of the enclosure also covered by a non-magnetic conductive sheet.

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2022

Electromagnetic Shielding

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Shielding effectiveness of a rectangular enclosure with finite wall thickness and rectangular apertures by the generalised modal method of moments

Cited by 19 publications

References 13 publications

Fast Calculation of the Shielding Effectiveness for a Rectangular Enclosure of Finite Wall Thickness and With Numerous Small Apertures

Fast Calculation of the Shielding Effectiveness for a Rectangular Enclosure of Finite Wall Thickness and With Numerous Small Apertures

A Hybrid Model for Electromagnetic Leakage From an Apetured Complex Metallic Enclosures

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