Use of Reverberation Chambers to Determine the Shielding Effectiveness of Physically Small, Electrically Large Enclosures and Cavities

Holloway, Christopher L.; Hill, David A.; Sandroni, M.; Ladbury, John M.; Coder, Jason B.; Koepke, Galen H.; Marvin, A.C.; He, Yuan

doi:10.1109/temc.2008.2004580

Cited by 90 publications

(48 citation statements)

References 18 publications

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“…The IEC 61000-4-21 standard [9] describes a particular approach to use the RC, the nested RCs approach, i.e., a smaller RC within a bigger RC, for measuring the SE of materials. Different research groups apply this technique to evaluate the SE of civil engineering materials [10][11][12][13][14]. The first formulation for the SE of the material under test (MUT) proposed in [10] has been improved during the years by considering new effective procedures which overcomes the drawbacks of the earlier ones.…”

Section: The Rc Measurements Methodsmentioning

confidence: 99%

“…Several experimental, analytical and numerical techniques to model civil materials for EMI interferences by evaluating their SE have been developed [6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…The RC is an isotropic multipath environment that better represents the real life environments where the fields are incident on the MUT with different polarizations [10][11][12][13][14][15]. In this paper, the RC is first employed to evaluate the SE of shields made with several civil materials having different mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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Shielding Effectiveness Tests of Low-Cost Civil Engineering Materials in a Reverberating Chamber

Migliaccio¹,

Ferrara²,

Gifuni³

et al. 2013

PIER B

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Abstract-In this paper, test study on low-cost civil engineering construction material is presented.In fact, in several civil constructions the strategy is to build up to first "fence" to EMI that limits interferences while using only in some limited areas high-cost ad hoc shielding material. The materials used in this study are tested at the Università di Napoli Parthenope, formerly Istituto Universitario Navale (IUN) Reverberating Chamber (RC) according to a nested approach. Tests are made in the frequency range from 2 to 18 GHz and show that low-cost materials are able to achieve about 16 dB of shielding effectiveness (SE) in contrast to ad hoc materials that show about 50 dB in SE.

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Section: The Rc Measurements Methodsmentioning

confidence: 99%

“…Several experimental, analytical and numerical techniques to model civil materials for EMI interferences by evaluating their SE have been developed [6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Shielding Effectiveness Tests of Low-Cost Civil Engineering Materials in a Reverberating Chamber

Migliaccio¹,

Ferrara²,

Gifuni³

et al. 2013

PIER B

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“…UWB pulses can have spectral components up to several GHz, which makes the excitation of cavity resonances probable. In order to consider the spectral density distribution of the interfering incident signal, another definition of the SE is available, the transient shielding effectiveness SE t | q according to Klinkenbusch (2005):…”

Section: Shielding Effectivenessmentioning

confidence: 99%

Effects of Aperture Size on <i>Q</i> factor and Shielding Effectiveness of a Cubic Resonator

et al. 2017

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Abstract. The EMC properties of a cubic metallic shield are highly affected by its resonances. At the resonant frequencies, the shielding effectiveness (SE) collapses, which results in high field strengths inside the cavity. This can cause failure or even breakdown of electronic devices inside the shield. The resonant behaviour is mainly determined by the quality or Q factor of the shield. In this paper, the effects of the aperture size on the Q factor and the SE of an electrically large, cubic shield are analysed. At first, a method is developed in order to determine the Q factor based on the resonance behaviour of the shield in time domain. Only the first resonance of the shield is considered therefore. The results are evaluated for different aperture diameters and compared with theory for the Q factor. The dominant coupling mechanism of electromagnetic energy into the shield is thus identified.Then the effect of aperture size on the SE is analysed. The excitation of resonances is very probable if the interfering signal is an ultrawideband (UWB) pulse, which constitutes a typical intentional electromagnetic interference (IEMI) scenario. Therefore, the relation between aperture size and SE is analysed using the theory of the transient SE for a broadband signal with a constant spectral density distribution. The results show, that a "worst case" aperture size exists, where the SE has its minimum.

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“…The proposed technique, with the use of conductive stirrers inside the enclosure under test, seems to be somewhat similar to the measurements in the nested reverberation chamber setup, but the stirrer's role is different. For example, Holloway et al in [9] analyse the use of the nested reverberation chamber and frequency stirring, which may be considered as an alternative technique to that presented here, but they did not study the possibility of modelling of different internal loading of the enclosure. Gifuni in [27] examines the relation between the enclosure SE and the wall material.…”

Section: Introductionmentioning

confidence: 99%

Internal stirring: an approach to approximate evaluation of shielding effectiveness of small slotted enclosures

Rusiecki¹,

Aniserowicz

Duffy

et al. 2016

IET Science, Measurement & Technology

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Abstract:A new technique for approximate evaluation of a small slotted enclosure shielding effectiveness (SE) is proposed. The enclosure under test is equipped with a built-in, rotating, conductive stirrer, and the SE is determined for discrete angles of the stirrer position. The SE characteristics computed in the frequency domain for the enclosure with the stirrer are compared to those of the enclosure containing different arrangements of printed circuit boards. The paper concludes that the inclusion of an internal stirrer is a potentially beneficial approach to shielding effectiveness testing.

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Use of Reverberation Chambers to Determine the Shielding Effectiveness of Physically Small, Electrically Large Enclosures and Cavities

Cited by 90 publications

References 18 publications

Shielding Effectiveness Tests of Low-Cost Civil Engineering Materials in a Reverberating Chamber

Shielding Effectiveness Tests of Low-Cost Civil Engineering Materials in a Reverberating Chamber

Effects of Aperture Size on <i>Q</i> factor and Shielding Effectiveness of a Cubic Resonator

Internal stirring: an approach to approximate evaluation of shielding effectiveness of small slotted enclosures

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Use of Reverberation Chambers to Determine the Shielding Effectiveness of Physically Small, Electrically Large Enclosures and Cavities

Cited by 90 publications

References 18 publications

Shielding Effectiveness Tests of Low-Cost Civil Engineering Materials in a Reverberating Chamber

Shielding Effectiveness Tests of Low-Cost Civil Engineering Materials in a Reverberating Chamber

Effects of Aperture Size on &lt;i&gt;Q&lt;/i&gt; factor and Shielding Effectiveness of a Cubic Resonator

Internal stirring: an approach to approximate evaluation of shielding effectiveness of small slotted enclosures

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Effects of Aperture Size on <i>Q</i> factor and Shielding Effectiveness of a Cubic Resonator