Measured electromagnetic shielding performance of commonly used cables and connectors

Hoeft, L.O.; Hofstra, J.S.

doi:10.1109/15.3304

Cited by 48 publications

(23 citation statements)

References 9 publications

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“…The basic parameters used for the assessment of the quality of the connector shield are: the shielding effectiveness -α SE , transfer impedance -Z T and selected elements of dispersion matrix -S [11], [14], [15]. These parameters and the methods for them measuring were defined for the frequency range for which the dimensions of the connector are much lower than the wavelength of the test signal.…”

Section: The Measuring Procedures and The Methods Of Assessing Thmentioning

confidence: 99%

“…The properties of the shield are also assessed through the surface transfer impedance Z T that is defined as a ratio of the voltage drop U on the shield length l, to the current value I that was caused by the voltage drop and is expressed as the unit of length [11]. The advantage of this method is that measurement is independent of the test setup.…”

Section: The Measuring Procedures and The Methods Of Assessing Thmentioning

confidence: 99%

“…The best method to compare the quality of the cable and connector shielding is co called shielding effectiveness, defined as a ratio of the signal induced in the cable and connector wires, to the surrounding signal [9], [11]. The literature describes a lot of systems and methods of measuring the effectiveness of connectors shielding along with the wires [4], [11].…”

Section: Introductionmentioning

confidence: 99%

“…The literature describes a lot of systems and methods of measuring the effectiveness of connectors shielding along with the wires [4], [11]. The main disadvantage of these systems and measuring method is using a flexible wire mounted along the cable and connectors as the radiating source.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Metrological Properties of the Test Setup for Determination Shielding Effectiveness of the Industrial Cable Connectors

Kopka

Tarczyński

Pluta

2017

International Journal of Electronics and Telecommunications

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Abstract-The paper presents results related to assessment of the repeatability and reproducibility of the measurement test setup for determination the relative value of the shielding effectiveness coefficient of the industrial connectors. The construction of the proposed test setup, the measurement method and the procedure for the analysis of measurement results were described. To determine the value of the repeatability and reproducibility coefficient, the two-way analysis of variance was used, which additionally allows for an assessment of the influence of individual sources of variance. The measurements and their analysis were conducted for several frequencies in the range up to 1 GHz. Additionally, the expanded measurement uncertainty, including the test setup and instruments uncertainty was estimated.

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Section: The Measuring Procedures and The Methods Of Assessing Thmentioning

confidence: 99%

Section: The Measuring Procedures and The Methods Of Assessing Thmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Metrological Properties of the Test Setup for Determination Shielding Effectiveness of the Industrial Cable Connectors

Kopka

Tarczyński

Pluta

2017

International Journal of Electronics and Telecommunications

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“…Also design criteria for EMC are not only important for the desired functionality, stability and performance; but also the device must meet legal requirements of almost all countries in the world before it can be sold [14,15]. In addition to device interaction, it has been reported that in residential areas which have continuous exposure to electromagnetic fields, these cause bio-interactions and can lead to health problems in humans [16].…”

Section: Introductionmentioning

confidence: 99%

Material Analysis and Application for Radio Frequency Electromagnetic Wave Shielding

Yener

Cerezci

2016

Acta Phys. Pol. A

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Our environment is full of radio frequency (RF) electromagnetic radiation due to rapid progress of wireless communication technologies, which have many applications, such as base stations of mobile communication networks and wireless internet antennas. In the context of Electromagnetic Compatibility (EMC) discipline, the word shield is used to describe any sort of metal sheet or material capable of reflecting, refracting or absorbing electromagnetic radiation (EMR), which is custom manufactured for the target electronic device casing, in a way to intervene any radiation passing to and from the device. Examining of electromagnetic shielding effectiveness (SE) is an important part of not only ensuring electromagnetic compatibility and of protecting electrical and electronic equipment but also protection of human beings against electromagnetic energy exposure as well. In this study, after a brief introduction and review on electromagnetic shielding, material selection and their applications for an indoor environment protection against electromagnetic radiation are explained. Potential electromagnetic shielding values of fabrics found in the market have been analyzed and compared by considering various criteria and requirements. Experimental results show that around 20 dB shielding effectiveness values can be obtained using test fabrics for a typical indoor environment.

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Novel cable shielding materials based on the impregnation of microporous membranes with inherently conducting polymers

Kathirgamanathan

1993

Advanced Materials

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Communications ADVANCED MATERIALStransfer transition. Support for this explanation comes from measurements at low temperature (200 K). Only the absorption band at 6300 cm-' shifts to smaller wavenumbers and increases in intensity.Apparently, methyl substitution inhibits planarization of the molecule and causes localization of the excess charge on a biphenyl subunit. A similar behavior is observed with S'", where the charge is localized on a terphenyl segment rather than delocalized over the whole n-system. This charge localization leads to the appearance of intervalence bands.r101 Such charge transfer transitions have also been observed for ionic derivatives of oligo(m-phenyleneviny1ene)s ll,[' which exhibit charge localization for topological reasons. In principle, localization of excess charge in a particular subunit of an extended n-system could also result from the polarizing effects of the counter ions. It is unlikely, however, that such an effect would occur in 7-9 and not in the closely related chains 2-4.The absorption spectra of the dianions of both classes of oligomers are very similar. Transfer of the first electron causes a geometrical reorientation towards a more planarized, quinoid system to stabilize the monoanion. The second electron can then delocalize over the whole n-system.Additional support for these results comes from the cyclovoltammetric investigation of the oligomers.rsl For instance, the first reduction potential of 7 is observed at -2.75 V. Comparison with the first reduction potential of 5 (-2.81 V) suggests that the electron is transferred to a biphenyl-sized n-system. After the initial electron transfer the molecule planarizes, so that the second electron is completely delocalized. The reduction potential for this process also lies at -2.75 V, which closely corresponds to the quater-

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Measured electromagnetic shielding performance of commonly used cables and connectors

Cited by 48 publications

References 9 publications

Metrological Properties of the Test Setup for Determination Shielding Effectiveness of the Industrial Cable Connectors

Metrological Properties of the Test Setup for Determination Shielding Effectiveness of the Industrial Cable Connectors

Material Analysis and Application for Radio Frequency Electromagnetic Wave Shielding

Novel cable shielding materials based on the impregnation of microporous membranes with inherently conducting polymers

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