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An estimation method for the 2-port S-parameters of the circuit contained in a high-voltage (HV) unit mounted on electric-driven vehicles is presented. To obtain the S-parameters, first, the 4-port S-parameters for the propagation circuit are estimated using partial measurement. Several known loads are connected to the 2 ports in a HV unit in turn and the reflection and transmission characteristics...
Information leakage via electromagnetic (EM) radiation is an emerging issue for designers and users of electrical information devices. The importance of estimating the propagation area of information leakage is increasing due to the high demand for protecting such devices from eavesdroppers. We propose an efficient method for estimating the propagation area of information leakage via an EM field....
Since 2012, the global lightning and sprite measurements (GLIMS) mission has been conducted on the exposed facility of Japanese experiment module (JEM-EF) of the international space station (ISS). In this mission, the VHF broadband digital interferometer (VITF) attached on JEM-EF is designed to estimate the direction of arrival of electromagnetic waves. The VITF has the bandwidth from 70 MHz to 100...
Signal integrity issue has become more and more important in recent years. In order to have a good signal quality, many aspects in a digital channel must be carefully considered. In this paper we compare the effects of non-ideal output driver and different power distribution networks (PDNs) on the signal integrity. The channel performance variation under different driving bit rates is also analyzed...
This paper proposes a software-related conducted electromagnetic interference (SW-cEMI) model reduction process for two-stage pipelined microcontroller (μC). This paper is based on a black-box transfer function (BBTF) cEMI model building technology and a new proposed decomposition method to reduce the BBTF model (rBBTF) to a reasonable model size. If the number of a μC's machine codes is N and the...
In this paper, we have fundamentally studied the estimation of 10 m test-range electric field strength height pattern by means of measuring the tangential electromagnetic fields on the cubic surface surrounding Bi-conical and Log-periodic antennas placed above the ground plane by using the differential electric and magnetic probe. The analysis frequency range is from 30 MHz to 1GHz, and the polarization...
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...
The aim of this study is to develop accurate and reliable estimation method of EMF distributions in aircraft that can contribute to numerical EMI assessment technique. Electromagnetic field distributions created by a cellular radio inside a cabin of aircraft are analyzed and propagation characteristics are discussed from the analysis results. We use FDTD technique and a large-scale parallel computing...
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