Analytical formulation for the shielding effectiveness of enclosures with apertures

Robinson, M.P.; Benson, T.M.; Christopoulos, C.; Dawson, J.F.; Ganley, M.D.; Marvin, A.C.; Porter, S.J.; Thomas, D.W.P.

doi:10.1109/15.709422

Cited by 430 publications

(204 citation statements)

References 9 publications

(13 reference statements)

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“…500000 time steps have been carried out and 168 minutes is used. Since it is difficult for the HTSA to deal with apertures whose width is larger than its depth, he shielding effectiveness of only the proposed method is compared with the measurement of [34]. Figure 8 shows the calculated and measured shielding effectiveness at the center of the enclosure, which shows a good agreement.…”

Section: Numerical Resultsmentioning

confidence: 90%

A Simple Local Approximation FDTD Model of Short Apertures With a Finite Thickness

Xiong¹,

Chen²,

Mao³

et al. 2012

PIER

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Abstract-This paper brings forward a simple local approximation finite-difference time-domain (FDTD) method for the analysis of short apertures with a finite thickness. By applying the equivalence principle together with a simple local approximation, the varying field distribution is accurately derived. The updating equations for the slot field can be derived by casting the field distributions into the contour paths containing the apertures. The method has been applied to two problems and the results are compared with the high-resolution standard FDTD simulation results and the measurement results. The accuracy of the proposed method is verified from the comparison of both the field distribution and the time-domain and frequency-domain slot coupling results. It is demonstrated that the local approximation is highly efficient and timesaving, and the present method is stable, numerically and computationally efficient.

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Section: Numerical Resultsmentioning

confidence: 90%

A Simple Local Approximation FDTD Model of Short Apertures With a Finite Thickness

Xiong¹,

Chen²,

Mao³

et al. 2012

PIER

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“…It can be shown that although the aperture thickness is considered in [1] to yield an equivalent impedance for the represented coplanar strip transmission line, it does not confirm the real effect of the aperture thickness on the SE, specially for the large thicknesses. Here, the perforated thick wall is represented by its reflection coefficient reported in [19] between free space and the enclosure.…”

Section: Introductionmentioning

confidence: 99%

“…Approximate analytical methods are accurate but applicable only to simple geometries. A simple analytical method has been introduced by Robinson et al based on a transmission line model [1]. In this method, the rectangular enclosure is modeled by a short-circuited rectangular waveguide and the aperture is represented by a coplanar strip transmission line.…”

Section: Introductionmentioning

confidence: 99%

“…Here, the perforated thick wall is represented by its reflection coefficient reported in [19] between free space and the enclosure. Then, similar to [1], the enclosure is modeled as a shorted waveguide represented by its equivalent transmission line model. Here, a TE 10 propagating mode is assumed and the incident wave is modeled by a voltage source and the free-space impedance in the equivalent circuit.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, the original waveguide equivalent circuit model of [1] is modified to take into account the wall thickness of the perforated wall with a large number of square or circular apertures. It can be shown that although the aperture thickness is considered in [1] to yield an equivalent impedance for the represented coplanar strip transmission line, it does not confirm the real effect of the aperture thickness on the SE, specially for the large thicknesses.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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FDTD analysis of electromagnetic penetration into a rectangular enclosure with multiple rectangular apertures

Park

Kim

Chung

et al. 1999

Microw. Opt. Technol. Lett.

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The shielding effectiveness of a rectangular enclosure with multiple apertures is investigated using the finite‐difference time‐domain (FDTD) method. It is shown that increasing the number of apertures influences the shielding effectiveness of the rectangular enclosure. The arrangement of the apertures is found to affect the shielding properties as well. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 22: 188–191, 1999.

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Analytical formulation for the shielding effectiveness of enclosures with apertures

Cited by 430 publications

References 9 publications

A Simple Local Approximation FDTD Model of Short Apertures With a Finite Thickness

A Simple Local Approximation FDTD Model of Short Apertures With a Finite Thickness

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

FDTD analysis of electromagnetic penetration into a rectangular enclosure with multiple rectangular apertures

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