A method for evaluating the shielding effectiveness of small enclosures

Ustuner, Fatih; Akses, A.; Araz, İ.; Çolak, Bektaş

doi:10.1109/isemc.2001.950459

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…The transmitting antenna is placed outside the enclosure whereas the receiving antenna is located inside the enclosure. This method is suitable for the SE evaluation of shielding room, the evaluation of small enclosures and shielding materials cannot be performed as they do not evaluate the individual properties of the shielding materials [21][22].…”

Section: Introductionmentioning

confidence: 99%

Shielding effectiveness measurement of cement-graphite block in between 3.8 GHz to 6 GHz

et al. 2020

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Due to proliferation of electronic devices, the electromagnetic field (EMF) exposure affect human health in long term. On the other hand the operation electronic devices will be affected if the radiation level is too high. To reduce the radiation exposure, shielding is always used. Instead of building a shielding enclosure inside a building, it is more practical to improve the shielding capability of the building itself. Hence, this project intend to investigate the shielding effectiveness (SE) of cement added with graphite. Eight cement-graphite specimens with different percentages (0%, 3%, 7%, 11%, 15%, 19%, 25% and 30%) are prepared. They have been casted into the waveguide mold with size of 4.75 cm x 1 cm x 2.22 cm and taken for measurement directly. The SE measurement setup involve a pair of waveguide with frequency range of 3.8 GHz to 6 GHz and vector network analyser (VNA). Throughout the study, it is found that the percentage of graphite powder will affect the SE of the specimens. The SE is independent on its curing duration. More than 11% of graphite is needed to improve the SE of cement block in between 3.8 GHz to 6 GHz. The highest SE of 33 dB is achieved when the sample contains 30% of graphite with thickness of 1cm.

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Section: Introductionmentioning

confidence: 99%

Shielding effectiveness measurement of cement-graphite block in between 3.8 GHz to 6 GHz

et al. 2020

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“…Although [2] is being revised and a section on techniques for smaller enclosures is expected the techniques to be defined are still under discussion, possibilities include stirred mode and conducted techniques (e.g. current injection, transfer impedance) [3,4,5]. The techniques presented here are more appropriate to smaller enclosures and have the advantage over some of the other techniques that the results would be appropriate to loaded enclosures and could reduce the possibility of using over specified enclosures.…”

Section: Introductionmentioning

confidence: 99%

A Proposed New Definition and Measurement of the Shielding Effect of Equipment Enclosures

Marvin

Dawson

Ward³

et al. 2004

IEEE Trans. Electromagn. Compat.

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This paper describes the rationale behind a new proposed measurement of the screening effect of an equipment enclosure that takes into account the contents of the enclosure. The method uses a set of representative contents for enclosures. The representative contents are equipped with surface field probes to measure the power entering the contents. The ratio of this power to the incident power density is used to derive a quantity with the dimensions of area, termed here the Shielding Aperture. The measurement technique is described and examples of measurements are given along with computed comparisons with the conventional Shielding Effectiveness of the enclosures used.

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“…and such simulations are v e c time consuming with quite large memory requirements and also limited to enclosures with only a m a l l number of apertures. The aiithon of referenccs [2] proposed a practical method for evaluating the shielding effectiveness of sinal1 enclosiires where do not allow the use of test antennas for the ineasiirenieiit due to the limited inner space of the enclosure dimensions. Actually, in most cases, estimation aid evaluation of the shielding effectiveness are needed during the product design stage.…”

Section: Introductionmentioning

confidence: 99%

An approach to shielding effectiveness estimation of electronic equipment enclosures

Guo

Song

et al.

2002 3rd International Conference on Microwave and Millimeter Wave Technology, 2002. Proceedings. ICMMT 2002.

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In this paper, an approach to the shielding effectiveness evaluation of electronic enclosures with small aperhires or slots is discussed. We use transmission line theory to analyze tlie equipment enclosures or boses with mall aperhues or slots. The eiiclosiire was represented by a length of coplanar strip triuisinission line. The effect of freqncncy, the dimensions of enclosiirc and the size of apeanre in the enclosiire are taken into account on the shielding effectiveness calculation. Compii'ter simulation is used for the evaliiation. Simulation results arc well agreement with tested data.

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A method for evaluating the shielding effectiveness of small enclosures

Cited by 3 publications

References 2 publications

Shielding effectiveness measurement of cement-graphite block in between 3.8 GHz to 6 GHz

Shielding effectiveness measurement of cement-graphite block in between 3.8 GHz to 6 GHz

A Proposed New Definition and Measurement of the Shielding Effect of Equipment Enclosures

An approach to shielding effectiveness estimation of electronic equipment enclosures

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