On Measuring Shielding Effectiveness of Sparsely Moded Enclosures in a Reverberation Chamber

Tait, Gregory B.; Hager, Carl E.; Slocum, M.B.; Hatfield, M.O.

doi:10.1109/temc.2012.2220779

Cited by 46 publications

(11 citation statements)

References 16 publications

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“…An enclosure can be utilized for both methods. Designing an enclosure with its apertures is an attractive subject in EMC studies in recent years [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

A fast method for estimating shielding effectiveness of an enclosure with apertures

Shourvarzi

Joodaki

2014

2014 International Symposium on Electromagnetic Compatibility

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A new and fast method to determine the shielding effectiveness (SE) of an enclosure with aperture is proposed. This method is based on the Z-parameter analysis combined with a circuit theory to define which configuration of the apertures can result in the optimum SE. The method is based on the fact that an aperture with the least destruction in the current flow due the incident field will have most effective canceling field. To show the effectiveness of the method and its excellent capability in estimating SE two examples, which have been numerically investigated in recent literatures, are solved. The simulation results of this fast and simple technique fit very well with those of the complex and time consuming numerical approaches. Furthermore, using this method the designer is able to recognize the problematic points and easily can optimize the shielding geometry.

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“…An enclosure can be utilized for both methods. Designing an enclosure with its apertures is an attractive subject in EMC studies in recent years [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

A fast method for estimating shielding effectiveness of an enclosure with apertures

Shourvarzi

Joodaki

2014

2014 International Symposium on Electromagnetic Compatibility

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“…Shielding coefficient KS is determined by the intensity of electric field strength E, possibly based on the intensity of the magnetic field H by the relation [3], [4], [5]:…”

Section: Shielding Effectivenessmentioning

confidence: 99%

Measuring of Shielding Effectiveness of Electromagnetic Field of Polystyrene in the Frequency Range from 1 GHz to 9 GHz

Pavlík

Kolcunová

Zbojovský

et al. 2014

Power and Electrical Engineering

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-This paper deals with measurement of the shielding effectiveness against the electromagnetic field. Shielding effectiveness against the electromagnetic field characterizes property of material to penetrate the electromagnetic field. Measuring of shielding effectiveness was performed in the frequency range from 1 GHz to 9 GHz with a step of 0.2 GHz. Measurement was performed in non-reflection chamber. Measured objects were the construction materials: Styrodur polystyrene with thickness of 50 mm, Styrodur polystyrene with thickness of 25 mm and their combination. The result of measurement is comparation of shielding effectiveness of shielding objects.

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“…This protection is generally provided through electromagnetic shielding and may take the form of an enclosure, such as a metallic cavity, which may allow external EM fields to penetrate the interior of the cavity. This enclosure may support resonances with high-quality factor, which may lead to very large interior field levels [1][2][3][4][5][6][7][8]. These large fields could in turn be harmful to circuits and systems therein.…”

Section: Introductionmentioning

confidence: 99%

Penetration Through Slots in Cylindrical Cavities Operating at Fundamental Cavity Modes in the Presence of Electromagnetic Absorbers

Campione¹,

Warne²,

Reines³

et al. 2020

PIER M

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Placing microwave absorbing materials into a high-quality factor resonant cavity may in general reduce the large interior electromagnetic fields excited under external illumination. In this paper, we aim to combine two analytical models we previously developed: 1) an unmatched formulation for frequencies below the slot resonance to model shielding effectiveness versus frequency; and 2) a perturbation model approach to estimate the quality factor of cavities in the presence of absorbers. The resulting model realizes a toolkit with which design guidelines of the absorber's properties and location can be optimized over a frequency band. Analytic predictions of shielding effectiveness for three transverse magnetic modes for various locations of the absorber placed on the inside cavity wall show good agreement with both full-wave simulations and experiments, and validate the proposed model. This analysis opens new avenues for specialized ways to mitigate harmful fields within cavities.

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On Measuring Shielding Effectiveness of Sparsely Moded Enclosures in a Reverberation Chamber

Cited by 46 publications

References 16 publications

A fast method for estimating shielding effectiveness of an enclosure with apertures

A fast method for estimating shielding effectiveness of an enclosure with apertures

Measuring of Shielding Effectiveness of Electromagnetic Field of Polystyrene in the Frequency Range from 1 GHz to 9 GHz

Penetration Through Slots in Cylindrical Cavities Operating at Fundamental Cavity Modes in the Presence of Electromagnetic Absorbers

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