Estimation of Electromagnetic Shielding Efficiency

Gabrousenko, Ye. I.; Holubnychyi, A. G.; Hu, Zhengbing; Taranenko, A. G.; Yanovsky, F.J.

doi:10.1615/telecomradeng.v78.i2.90

Cited by 3 publications

(1 citation statement)

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“…e specific test steps are as follows: calibrate the two ports of the connecting cable to eliminate the error caused by the transmission loss of the connecting cable; pass the prepared cable under test through the triaxial clamp; connect both ends of the cable shielding layer to the semicircular copper block; short-circuit the cable shielding layer and the triaxial outer loop copper pipe; connect the output end of the network analyzer to the inner ring of the triaxial system. e input terminal is connected to its external circuit [28]. e return loss S11 and transmission loss S21 of the three coaxial systems are measured by the vector network analyzer.…”

Section: Electromagnetic Field Detection Analysis and Shielding Experiments Of Power Cablementioning

confidence: 99%

Electromagnetic Field Analysis and Shielding Method of Underground Variable Frequency Power Cable

Zhang

Yang

2022

Advances in Civil Engineering

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The transmission and radiation of underground variable frequency electromagnetic waves will seriously interfere with the operation of the power cable and its surrounding environment. At present, the test methods for power cables basically require the impedance of the test system to match the characteristic impedance of the cable. The defect is that the process of designing and making the impedance matching impedance network is relatively complex and requires high manufacturing accuracy. In order to solve these problems, this paper puts forward the electromagnetic field fast detection formula and electromagnetic field shielding method of underground variable frequency power cable. The research method of this paper is the principle of shielding electromagnetic field materials and the suppression principle of shielding layer for electromagnetic coupling. The function of the two principles is to study the reflection, absorption, and multiple reflection of electromagnetic waves and to study the cut-off frequency of the nonmagnetic shielding layer. These two principles guide the experiment. In this paper, the measurement formula of the shielding performance of mismatched cables is derived through experiments. The results show that the error of the measurement formula is no more than 8 dB. Then, through the experiment of restraining the interference of magnetic materials on the electromagnetic field, it is concluded that the magnetic field shielding performance can reach 20 dB. Then, through the performance test of electromagnetic field shielding materials, the shielding efficiency of metal fiber antiradiation materials is the largest, and the average efficiency reaches 76.4 dB.

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Section: Electromagnetic Field Detection Analysis and Shielding Experiments Of Power Cablementioning

confidence: 99%

Electromagnetic Field Analysis and Shielding Method of Underground Variable Frequency Power Cable

Zhang

Yang

2022

Advances in Civil Engineering

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Well-Adapted to Bounded Norms Predictive Model for Aviation Sensor Systems

Holubnychyi

Lavrynenko

Bakhtiiarov

2023

Lecture Notes in Networks and Systems

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Impact of Number of Slots and Permittivity on EMI Shielding Effectiveness

J.¹,

Kirubakaran²,

Praveena³

et al. 2022

Antenna Design for Narrowband IoT

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All electronics equipment and devices emit electromagnetic energy. The emitted energy creates electromagnetic interference to the nearby electronic equipment. Shielding is the only effective method of reducing this type of interference without disturbing and reducing the performance of complex electronic systems. Shielding cages usually have openings or slots to provide ventilation and enable access to electronic components placed inside the cage. In this chapter, the impact of dimension of the shielding cage and the number of slots in the shielding cage are investigated. Relative permittivity reflects the electrical characteristics. Its impact on shielding effectiveness is also analyzed in this chapter. Simulation results shows decrease in the shielding effectiveness with the increase in number of slots as well as increase in relative permittivity. In addition, the shielding effectiveness decreases with the increase in frequency.

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Estimation of Electromagnetic Shielding Efficiency

Cited by 3 publications

References 0 publications

Electromagnetic Field Analysis and Shielding Method of Underground Variable Frequency Power Cable

Electromagnetic Field Analysis and Shielding Method of Underground Variable Frequency Power Cable

Well-Adapted to Bounded Norms Predictive Model for Aviation Sensor Systems

Impact of Number of Slots and Permittivity on EMI Shielding Effectiveness

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