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Electromagnetic interference can cause severe degradation of the performance of wireless communication systems. In order to predict or handle the performance degradation, methods for calculating the impact of the interference is needed. However, for a communication system that is subjected to several impulsive interference sources, the performance is hard to calculate exactly. In addition, using standard...
This paper studies the impact of the accelerated thermal aging on the conducted emission produced by a synchronous buck converter. The most degraded devices mounted on the DC-DC converter are identified and modeled in order to simulate the evolution of conducted emission and anticipate risks of non-compliance to emission requirements.
In this paper, a lamination of a magnetic sheet and a copper sheet is proposed to obtain wideband shielding effect from kHz to MHz bands. The requirement of the laminated magnetic sheet was discussed. A cap type shield case applying the laminated sheet 53 μm thick was fabricated and its shielding effect was measured. The higher shielding effect was obtained using the proposed sheet in the frequency...
Liquid crystal polymer (LCP) substrates are used to design 3D conformal antenna elements in laser direct structuring technology (LDS) for MIMO and phased-array applications. Perspectives for energy-oriented built-in-self-test (BIST) compensation solutions are drawn for multiphysics electromagnetic-thermal-mechanical co-design of chip-package-PCB systems undergoing stochastic changes in their integration...
This paper presents a method for studying the performance of mode-stirrers used in Reverberation chamber (RC) by studying their Doppler spectrum obtained in free space or in RC. Indeed, a mode-stirrer must have the largest diffracting properties corresponding to a Doppler Spectrum as spread as possible. For this purpose, a simple analytical model is proposed in order to obtain the Doppler spectrum...
A telecommunication equipment and information technical equipment usually produce unintentional electromagnetic fields. Information from a video display unit could be reconstructed by intercepting such emissions at a distance. The testing methods and countermeasure methods have been discussed and those standardizations have been published at ITU-T SG5 WP2, and ITU-T K.115: Mitigation methods against...
The algorithm of the electromagnetic environment estimation inside a cinema and concert hall control room, equipped by diverse (on power, sensitivity, frequency range and so forth) hardware, is proposed. The modeling program has been developed to simulate the indoor electromagnetic environment. The area of hardware control room is conventionally represented by two dimensional grids of cells for modeling...
Evaluating security vulnerabilities of software implementations at design step is of primary importance for applications developers, while it has received litte attention from scientific community. In this paper, we describe virtual prototyping of an implementation of scalar multiplication aiming to make it secure against simple side-channel attacks. Reproducing information leakage as close to reality...
Open Area Test Sites (OATS) serve as reference for antenna calibration and many types of electromagnetic compatibility tests, since they provide more accurate results than other testing environments. However, the high level of accuracy demanded by the standard CISPR 16-1-5 can only be guaranteed if certain parameters are well arranged. Moreover, the feasibility of sufficiently accurate measurement...
The nature of the Power Line Communication (PLC) equipment is complex because it is considered as an information equipment for Electro-Magnetic Compatibility (EMC) standardization, but it is used to inject High-Frequency (HF) and Very High Frequency (VHF) frequency signals on the existing power network which is not designed to guide these frequencies. This PLC system issue leads to some difficulty...
This paper deals with the numerical evaluation of the magnetic field produced by a wireless power transfer (WPT) system in an electrical vehicle (EV) made by carbon-fiber (CF) laminates that are modeled as homogeneous anisotropic layers. The numerically calculated magnetic field generated by a 7.7 kW WPT system operating at 85 kHz has been compared with the reference levels of the ICNIRP guidelines...
In this article, a surface mounted device (SMD) common-mode choke (CMC) required for unshielded-twisted-pair automotive communication systems (like 100Base-T1) is characterized in detail regarding its high-frequency filtering characteristics. Firstly, the S-parameters and mixed-mode S-parameters of the mentioned choke were measured using a 4-port vector network analyzer in a frequency range of 1 MHz...
In power electronics applications, high frequency models for cables are necessary to understand EMI issues in pulsewidth modulation drives. This paper shows the approach developed at the French Institute of Technology (IRT) Saint-Exupery, in order to take account of the frequency dependency of unshielded power cables per-unit-length parameters for EMC simulations. Fast, predictive models are compared...
In this paper, an empirical Rice K factor, distribution is accomplished. The results show that the distribution obtained by measurements well-fitted with the Nakagami-m one. Data have been gathered within the reverberating chamber (RC) of the Università degli Studi di Napoli Parthenope, formerly Istituto Universitario Navale (IUN).
An original ElectroMagnetic simulation methodology based on the hybridization of deterministic and statistical models is proposed to study wireless signal propagation inside a train. The coupling between the EM methods is performed with the Kron's networks formalism to significantly optimize the compromise between simulations accuracy and computation resources. The proposed hybrid model offers promising...
Extremely high levels of magnetic fields can be generated by Wireless Power Transfer (WPT) systems for E-vehicles. There is a concern on the impact of human exposure to electromagnetic fields of WPT especially on any cell responses related to potential hazards. In this paper, a novel 3D coil winding structure is proposed to achieve an extremely uniform magnetic field inside the solenoid required for...
An analysis method is studied for the amount and distribution of antenna mode current which is the source of radiation problems in the differential channels. By taking the nearby shield or real system ground into account, the multiconductor-transmission-line method can be applied and then the mode conversion from differential mode or common mode to antenna mode can be calculated. As validation, there...
One important objective of the electromagnetic compatibility (EMC) studies is to make the products compliant with the EMC requirement of the customers or the standards. However, all the EMC compliance verifications are applied before the delivery of final products. Will the product still be EMC compliant during the lifetime? If not, what is the risk of non-compliance with EMC requirements, and how...
This paper presents a simulation methodology for efficient investigation of human exposure to low-frequency (1 Hz to 10 MHz) electromagnetic fields generated by automotive electrical systems such as wireless power transfer (WPT) systems. The main stages of the modeling process are discussed. A simulation approach based on the combination of computationally efficient methods such as surface integral...
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