Decomposition of Electromagnetic Interferences in the Time-Domain

Azpúrua, Marco A.; Pous, Marc; Silva, Ferran

doi:10.1109/temc.2016.2518302

Cited by 52 publications

(28 citation statements)

References 22 publications

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“…Shielding can be placed around circuits, systems, wires or communication cables [23]. The reduction of the radiant electromagnetic field in the shielding is determined by the SE coefficient [24][25][26][27]. An enclosure with dimensions of 20*20*40 is simulated with the aperture and the simulation of Shielding effectiveness is performed by using three methods of numerical solution, FDTD, MOM and equivalent circuit in a Curved enclosure with Apertures.…”

Section: Simulation and Computingmentioning

confidence: 99%

Comparison of Shielding Effectiveness in Complex Curved Structure with Different Numerical Methods, FDTD, MOM and Equivalent Circuit

mohammadi¹,

Amirani²,

Faghihi³

2018

IJEECS

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<p>The study of the effect of shielding on high frequency equipment is very important in the electromagnetic compatibility of control and communication equipment. In this paper, while presenting a curved complex structure for the shielding enclosure, the different number of apertures with different dimensions has been investigated. A rectangular structure with two curved parts behind of the enclosure simulated based on numerical methods, FDTD, MOM and equivalent circuit for better analysis of electromagnetic interference. After introducing the proposed structure and presenting the curvature theory, simulation results are displayed and compared in the selected frequency range for three numerical methods. It has been shown that increasing the number of apertures by reducing the size, increases the effectiveness of the protective shield. However, increasing the number of resonances by increasing the apertures indicates the importance of studying the equipment more precisely before choosing the structure of enclosure. We present a complex structure for the enclosure and the different number and dimensions of apertures with different materials were investigated for analyzing the effect of shielding on electromagnetic interference. The necessity of choosing a more effective enclosure according to the frequency of the equipment is specified. Finally, three methods of numerical solution, FDTD, MOM and circuit equal comparition were performed with measured value. Changes in the Shielding effectiveness and the number of resonant in the frequency range were determined. The exact examination of equipment requires shielding and their frequency and the type of inside-to-outside communication device before choosing shieldin is important. We used a comparison of three numerical solution methods for examining the field distribution in a complex structure enclosure with different apertures and different materials. In the majority of cases, the proximity of the measured values in this frequency range with the MOM curves shows the performance of this method in complex structures.<em></em></p>

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Section: Simulation and Computingmentioning

confidence: 99%

Comparison of Shielding Effectiveness in Complex Curved Structure with Different Numerical Methods, FDTD, MOM and Equivalent Circuit

mohammadi¹,

Amirani²,

Faghihi³

2018

IJEECS

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“…where ( ) is the instantaneous amplitude and ( ( )) is the Hilbert Transform of ( ), which is given by [14,15] Figure 14 shows the mathematical generated signal. Figure 15 shows the experimental reference signal and its extracted envelope using Hilbert transform, implemented under MATLAB.…”

Section: Experimental Envelope Detectionmentioning

confidence: 99%

Overlapping Signal Separation Method Using Superresolution Technique Based on Experimental Echo Shape

Al-Oudatallah

Abboud

Khoury

et al. 2017

Advances in Acoustics and Vibration

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Overlapping signals separation is a difficult problem, where time windowing is unable to separate signals overlapping in time and frequency domain filtering is unable to separate signals with overlapping spectra. In this work, a simulation under MATLAB is implemented to illustrate the concept of overlapping signals. We propose an approach for resolving overlapping signals based on Fourier transform and inverse Fourier transform. The proposed approach is tested under MATLAB, and the simulation results validate the effectiveness and the accuracy of the proposed approach. The approach is developed using Gerchberg superresolution technique to cope with signals with low signal-to-noise ratio. For practical work, an echo shape determination is required to apply the proposed technique. The experimental results show accurate localization of multiple targets.

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“…Recently, an improved version of EMD with transient decomposition capabilities was successfully used to decompose EMI complex signals [11]. However, time-domain EMI measurements require long acquisitions at very high sampling rates (several times the Nyquist limit) and analyzing EMI measurements with EMD is a resource and time consuming computational process.…”

Section: B the Sliding Window Emdmentioning

confidence: 99%

“…Measurements were performed with a Full-TDEMI measurement system based on a Tektronix DPO5104B oscilloscope, using a sampling rate of 5 GS/s and a record length of 1 ms, in the 30 MHz -1 GHz frequency band, using a 120 kHz resolution bandwidth and a 30 kHz step size [11], [13], [14], [16]. The test setup was placed inside a Full Anechoic Room (FAR) from which the doors were left intentionally opened in order to capture the ambient noise signals.…”

Section: Application Examplementioning

confidence: 99%

A single antenna ambient noise cancellation method for in-situ radiated EMI measurements in the time-domain

Azpúrua

Pous

Silva

2016

2016 International Symposium on Electromagnetic Compatibility - EMC EUROPE

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Decomposition of Electromagnetic Interferences in the Time-Domain

Cited by 52 publications

References 22 publications

Comparison of Shielding Effectiveness in Complex Curved Structure with Different Numerical Methods, FDTD, MOM and Equivalent Circuit

Comparison of Shielding Effectiveness in Complex Curved Structure with Different Numerical Methods, FDTD, MOM and Equivalent Circuit

Overlapping Signal Separation Method Using Superresolution Technique Based on Experimental Echo Shape

A single antenna ambient noise cancellation method for in-situ radiated EMI measurements in the time-domain

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