The effect of aperture shape, angle of incidence and polarization on shielding effectiveness of metallic enclosures

Başyiğit, İbrahim Bahadır; Doğan, Habib; Helhel, Selçuk

doi:10.1080/08327823.2019.1607496

Cited by 22 publications

(14 citation statements)

References 18 publications

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“…It is known that the quality and type of mesh used for discretizing the computational volume plays a critical role in simu- lation speed and accuracy. The adaptive meshes allow for a balance between computational speed and accuracy [30]. All cases were calculated on the same computer running a 2.2-GHz Intel i7-8750 CPU.…”

Section: Validationmentioning

confidence: 99%

A hybrid algorithm method for calculating electromagnetic shielding effectiveness of apertured enclosure with an arbitrary inner window

Zhou

Wang

Zou

2022

IEICE Electron. Express

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A hybrid algorithm method for predicting the shielding effectiveness (SE) of apertured enclosure with an arbitrary inner window was proposed. By applying the concept of electromagnetic topology, equivalent circuit models of the enclosures are derived. The equivalent impedance of the arbitrary inner windows are calculated by a full-wave method. Then, the shielding effectiveness can be obtained using the extended BLT equation. Compared with full wave numerical simulation, the proposed method can reduce the computation time from 1000 seconds to 100 seconds while maintaining a very close accuracy.

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Section: Validationmentioning

confidence: 99%

A hybrid algorithm method for calculating electromagnetic shielding effectiveness of apertured enclosure with an arbitrary inner window

Zhou

Wang

Zou

2022

IEICE Electron. Express

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“…After measuring the S‐parameters, the frequency stirring was applied to the measured S‐parameters, as expressed in Equations ) and (). The frequency stirring averages the measured S‐parameters over a predetermined bandwidth, so it reduces the measurement error, similar with the error reduction methods in References 11 and 12. The bandwidth used for the frequency stirring is 50 MHz.…”

Section: Influence Of the Cable‐coupling Se On Se Measurementmentioning

confidence: 99%

“…In SE measurements, mutual coupling between the measurement antenna and a shielding enclosure can increase the measurement error 11 . The IEEE 299.1‐based SE measurement, however, does not experience mutual coupling because, as shown in Figure 1, the RC's transmitting antenna is located outside a shielding enclosure, unlike in Reference 11. Coupling exists between the enclosure's receiving antenna and shielding enclosure.…”

Section: Influence Of the Cable‐coupling Se On Se Measurementmentioning

confidence: 99%

Improvement of shielding measurement for small‐sized enclosures with consideration to the shielding quality of antenna cables

Hwang

Hyoung

Kwon

et al. 2020

Micro & Optical Tech Letters

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This article presents an improvement to IEEE 299.1 standard used to measure the shielding effectiveness (SE) of smallsized metallic enclosures in a reverberation chamber. The shielding quality of radio-frequency (RF) cables used for SE measurement significantly affects measurement accuracy, especially when metallic enclosures have a high level of SE. A new measurement parameter is introduced to represent a measurable range in which SE can be measured without being affected by the shielding quality of the RF cables. The proposed parameter can be effectively used for the IEEE 299.1-based SE measurement method to improve measurement accuracy. In our experiments, the utilization of the proposed parameter confirms that the IEEE 299.1 method can measure SE of 87.5 dB up to 4 GHz. Furthermore, to reduce coupled noise through the antenna cable, three different methods are applied together during the shielding measurement of a high-SE enclosure. Our experimental results show that these methods extend the measurable SE range up to 95 dB at frequencies below 4 GHz.

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“…Huiyu Chang (e-mail: changhuiyu@njust.edu.cn), Jiale Gao (e-mail: gaojiale@njust.edu.cn), Yanghui Wu (e-mail: YHWu@njust.edu.cn), Chen Fu of view, after decades of research and improvement, highperformance metal grid EM shielding films have been successfully fabricated [9]- [12]. Basyigit et al [13] studied the influence of the aperture shape of the metal grid on the electrical shielding efficiency through simulation. The results show that rectangular apertures have more effective electromagnetic shielding than square, circular, equilateral triangle and hexagonal apertures.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the Electromagnetic Shielding Effectiveness of Metal Grid Using Neural Network Algorithm

et al. 2021

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With the advantages of simple structure, high electromagnetic (EM) shielding effectiveness (SE), wide shielding bandwidth and adjustable transmittance, the metal grid is a popular tool in the field of electromagnetic shielding. In this work, the deep learning algorithm of artificial neural network was used to predict the EM SE of the metal grid. After certain number of trainings, both the SE spectrum and the minimum SE value in a given frequency band can be predicted accurately and effectively. On the other hand, for a target SE, the design parameters of the metal grid structure can be immediately predicted. The results show that the relative mean square deviation of the predicted SE curve is about 5%, the relative error of the minimum SE value of the curve is less than 5%, and the average relative error of the minimum SE value in the predicted frequency band is 11.5%.

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The effect of aperture shape, angle of incidence and polarization on shielding effectiveness of metallic enclosures

Cited by 22 publications

References 18 publications

A hybrid algorithm method for calculating electromagnetic shielding effectiveness of apertured enclosure with an arbitrary inner window

A hybrid algorithm method for calculating electromagnetic shielding effectiveness of apertured enclosure with an arbitrary inner window

Improvement of shielding measurement for small‐sized enclosures with consideration to the shielding quality of antenna cables

Prediction of the Electromagnetic Shielding Effectiveness of Metal Grid Using Neural Network Algorithm

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