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In this paper, we successfully demonstrated a software application on the android platform of mobile phone which allows users to have a quick insight of radiated emission generated based on the image of a printed circuit board (PCB) by using analytical method and image processing. For benchmarking the application, a study on the radiated emission of PCBs with the use of electromagnetic compatibility...
The fundamental properties and key parameters of the noise source modulation technique (NSMT) to determine the electromagnetic noise path are discussed. The basic idea behind the NSMT is to apply a known time variation (modulation) to one of the possible noise paths and to observe its effect at the noise victim location. Different modulations can be applied to different noise paths simultaneously...
In this paper, the impact of involving the coupling device in the radiation setup on the accuracy of the differential-mode current injection method is analyzed, when the antenna and the cable are the main coupling routes, respectively. The calibration method is then proposed correspondingly and the equivalence between the differential-mode current injection and the original radiation is achieved.
Shields generally solve EMC problems due to their high efficiency. When it comes to an electrical automotive drive system, the relatively small quantities of a non ideal shield are of importance due to the high level of emissions generated which face very stringent requirements for low level emissions. As a consequence, the shield and ground loop currents are decisive for various EMC conducted and...
Flexible printed circuits (FPCs) are already widely used to connect printed circuit boards in compact systems such as smartphones, tablets and laptops, where weight and space are at a premium. The latter are also increasingly important issues in the automotive industry, suggesting that flexible printed interconnects could also offer advantages in vehicle applications. This paper therefore discusses...
This paper presents a theoretical model for the characterization of complex flexible printed interconnects. The main aim of this work is to extract, from the multi-layers complex structure subject to harsh environment (high intensity electromagnetic fields), an equivalent circuit model from 500 MHz to 8 GHz. The proposed methodology requires assessing the voltages induced at the end of the signal...
Electronic equipment designed to be installed onto aircraft must be certified in accordance with established EMC standards. This paper is focused on section 20 of RTCA-DO160 which refers to conducted susceptibility in aeronautics. Since equipment can succeed or not in qualification test, aim is to be able to predict these levels of disturbance for limiting costs and time design. Moreover, aircraft...
A novel circuit model for short transmission lines is derived by a straightforward reduction of a broadband modal network considering only the static mode and acceleration inductances. The presented network is compared to conventional equivalent circuit models in time- and frequency domain. It is found that the novel network provides a better performance in almost all cases, although the network's...
This paper discusses the limitations of power line communication (PLC) in vehicles, regarding system loads, transceiver coupling circuits and cable topology. Firstly, ECU input impedances were analyzed to obtain typical termination load conditions in modern vehicle power supply systems. Coupling circuits and cable harness topologies for the power distribution network were proposed, as well. Then,...
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...
The influence of two short equivalent lines on the accuracy of the asymptotic method for electromagnetic field coupling to transmission line (TL) at high frequency is investigated. Firstly, the induced current distribution along the TL in terms of different lengths of two short lines is analyzed. It is indicated that the calculated induced current along the line by using asymptotic method is not reliable...
This paper presents an accurate and efficient time-domain approach for analyzing the coupling of transient electromagnetic fields into cable systems with arbitrary linear networks at terminations. Some nonlinear elements in termination circuits are also considered. The approach is based on hybridization of three different methods. First, the discontinuous Galerkin time domain (DGTD) method is used...
This paper presents the main results of a thesis work dedicated to the Specific Absorption Rate (SAR) risks in High-Frequency (HF), Very High-Frequency (VHF) and Ultra High-Frequency (UHF) frequency bands. The main goal of this thesis is to enhance SAR method validation of radio military exposure near high power antennas. It will permit to reduce cost and delay of SAR validation and quantify the actual...
In this study, RLCG method is used to estimate a low voltage transmission line for twisted overhead and underground low voltage distribution cables. This model is applied for cables with different types, different sections and lengths taking account the capacitive and the inductive coupling. SPICE determination of transmission characteristics and cables crosstalk are validated throughout physical...
For electromagnetic interaction analysis in power electronics, the study and the design of Near-Field integrated magnetic antennas are presented. An antenna model is developed and compared to experimental data. The modeling and the performances of the prototype is discussed in function of the source position and the antenna design.
In this paper, we model the inductive current clamp (ICC) method described in the ISO 7637-3 standard, where we apply a broadband transient signal as disturbance. To validate the advocated model, a nonlinear device under test (DUT) is simulated, manufactured and measured under the ISO 7637-3 standard test conditions. Furthermore, it is shown that the proposed model can be used to study the DUT's immunity.
For the system electromagnetic susceptibility or risk assessment, the electromagnetic norms of the field-line coupling currents are taken as the stresses on the electric interfaces. In order to obtain the statistical property of stresses, the factors in field-line coupling model is treated as the random variables. However, if every parameter were sampled, the computation will be heavily burdened and...
It is well-known that a resonating metamaterial can interact with other nearby resonating metamaterials. If this coupling is strong enough, it may change resonant behaviour of overall metamaterial structure composed of individual metamaterial resonators. Therefore, defining each part separately, especially the coupling factor, simplifies the electromagnetic compatibility (EMC) problems. In this study,...
In this article, an experimental validation of a simulation model of the stochastic electromagnetic field coupling to multiconductor transmission lines (MTL) above a ground plane is presented. The simulation model is based on the BLT (Baum-Liu-Tesche) equations and the excitation with a superposition of plane waves. The stochastic electromagnetic field coupling to an exemplary multiconductor cable...
If integrated circuit substrates are characterized from a propagative perspective, one can see that parameters such as the source current density distribution or the relative orientation between source and victim, also play a role in substrate coupling. In this paper, we analyze how different current distribution patterns excite interference propagation modes, in terms of matching and orientation...
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