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The emulation of the real-world of mains power cables in EMC test methods can be improved. We show that for devices with significant differential-mode emission in the frequency range 150 kHz to 30 MHz, the impedance balance of the mains cable should be specified, even when the actual measurement is of data cable emission. For the same reasons radiated emission testing between 30 MHz and 200 MHz may...
The consideration of measurement instrumentation uncertainty (MIU) is common practice when determining compliance or non-compliance with a disturbance limit. But MIU is just a subpart of the standard compliance uncertainty (SCU) which also addresses uncertainties related to the EUT set-up, EUT operation and measurement procedure. One major influence quantity of SCU is the termination of cables leaving...
This paper presents the research status of ITU-T SG5 on the issue of establishing a new recommendation: K.mpis. K.mpis can be applied to the case of evaluating the human exposure levels when a wireless installation begins to emit RF signal to start service.
The hand-held resonant magnetic field charger (HH-RMFC) is a convenient equipment of charging the batteries without any electrical contact. Due to high coupling coefficient of HH-RMFC, the single phase power inverter with square wave encounter relatively small reactance at its harmonic frequencies. Thus, the current flowing through the Tx and Rx windings can be distorted. The distorted current with...
Wireless power transfer technologies have been extensively researched for several decades and successfully deployed on a commercial scale. As studies on wireless power transfer technologies have progressed and its feasibility has been tested, electromagnetic radiated emissions have become more important subject than before. In this paper, we report the measurement and analysis of the electromagnetic...
Until recently, the presence of an AIMD has been considered a contraindication to MRI because of the potential adverse effects of MRI on AIMDs. However, all of AIMD manufacturers have released “MR Conditional” devices recently. These devices have been demonstrated to pose no known hazards in a specified MRI environment with specified conditions of use. Therefore, it is quite important to understand...
The newly developed electrode for human body model, which is used for evaluation of EMI to a cardiac Active Implant Medical Device (AIMD), is reported. The electrode consists of applying and monitoring of signal portion and reduces crosstalk and signal leakage in application of cardiac pacing and sensing. It is practical and sufficient means of simulating EMI effects to an AIMD.
This paper presents the research work focusing on charging the energy via the air to a small electric vehicle (EV). This work shows not only the possibility of wireless power charging, but also the electromagnetic compatibility (EM C) issue is taken into account. The charging system is described and set up using the resonance coupling effect and single-ended primary-inductor converter (SEPIC) for...
This paper presents a fast method to estimate Specific Absorption Rate (SAR) of multiple-antenna transmission systems which employ two or more antennas in a communication. SAR values for arbitrary sets of relative phases of the antennas at a measurement point can be estimated from measured E-field with few known relative phases at the same measurement point. Fundamental concepts and analyzes are presented...
This paper aims at resolving the visual simulation of electro-magnetic environment. It would build a set of parallel system from the perspective of EMC. The system works on the basis of C/S structure, and it has achieved beautiful interface and easy operation. It also adopts the parallel computing method for multiple child nodes and the acceleration algorithm of ray tracing. So the system could successfully...
Electronic devices may act as unintentional radiators. Hence, the prediction of their breakdown behaviour is not possible by design. Instead, time-consuming measurements are necessary to determine their radiation patterns. Stochastic approaches help to do approximations, but need to be validated e.g. by numerical field simulations. In this paper, simulation objects are created by the use of the software...
To overcome power distribution network (PDN) design challenges such as serious power noise, large system area burden, the wireless power transfer (WPT) system in the 3D package and IC is applied. In this study, the 3D multi-helix inductor is proposed for designing the 3D package and IC with a WPT scheme and an equivalent circuit modeling is also implemented. The fabricated package WPT system represents...
As new NAND specification such as Toggle 2.0 has been standardized and developed, supply voltage has been reduced from 3.3V to 1.8V because of the adoption of high-speed I/O. Accordingly, due to issues of the backward compatibility with previous specifications and the power budget, voltage regulator implemented in a package should supply the power to the I/Os. In this paper, we propose the advanced...
Advanced encryption standard (AES) cores suffer from information leakage through power supply currents, even with the wave dynamic differential logic (WDDL) known as one of the most tolerable countermeasure design styles against side channel attacks (SCA). The set of plaintexts having bitlevel biased activities are produced with a known secret key and used for diagnosing the vulnerability of AES cores...
In this paper, two kinds of compact waveguide structures based on through glass vias (TGVs) technology are proposed. A full-wave simulator on the basis of finite element method is applied to analyze the transmission characteristics of these structures. The return loss S11, transmission S21 and electric field distribution results show that they have the similar signal transmission performance of the...
An on-chip waveform monitoring technique embodies in-stack evaluation of three-dimensional integrated circuits (3D IC) regarding physical connections using through silicon vias (TSV) and electronic characteristics of signal transmission as well as noise propagation. On-chip generation of reference voltage steps and sampling timings reduces the complexity of analog signal routing in a chip stack and...
This paper presents an EMA (electromagnetic analysis) against an RSA software on an embedded operating system (OS) and its counter measure First, we describe a pre processing step to find an appropriate observation point for EMA, where the EM radiation caused by cryptographic operations can be observed in an accurate manner. We employ a specific input pattern, which is suitable for observing EM radiation...
In this paper, we propose an open-stub compensation technique for passive equalizers used in high-speed digital communication systems. By simply lumping an open-stub to the conventional RL-type passive equalizer, the frequency-dependent channel loss from the long transmission path can be compensated, the frequency response of the channel becomes more flat and the bandwidth is wider. Compared proposed...
When a primary factor of common-mode noise is corresponding to mismatch of balance on the wiring, the balance degree may be obtained from CMRR (Common Mode Rejection Ratio) of the printed circuit board in the equipment. We calculated CDF(Current Division Factors) as balance degree of micro strip lines. And we showed relational expression of the balance degree and CMRR. By the CMRR measurement, the...
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