The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The guard trace is effective for suppressing common-mode generation caused by placing a signal trace close to the return edge on a printed circuit board. Our previous studies on the guard trace focused only on a design methodology for reducing common-mode radiation, but the placing guard trace close to the signal line increases crosstalk to deteriorate signal integrity. A guard trace with a periodic...
In this study, common mode current, a dominant factor of unintentional radiation, on coaxial cable with twisted wire pair (TWP) is estimated. This cable model is a simplified model of a popular combination of balanced and unbalanced circuit, such as printed circuit board (PCB) with TWP. For the convenience of calculation and measurement the coaxial cable is employed as an unbalanced circuit instead...
The common-mode current on AC cable is one of radiated disturbance source below 300 MHz. The method of using common-mode absorbing device (CMAD) is discussed to improve reproducibility of test result by stabilizing the termination impedance of AC cable. However, CMAD can't stabilize the differential-mode impedance because this acts as a kind of common-mode choke coil. In this paper, the influence...
At present, radiated emission measurement standards do not specify the common mode impedance for the outlet terminal of mains network to equipment under test (EUT) in the test site. Because of the difference in the terminating condition of EUT power cable which dominantly causes radiated emission in the frequency range between 30 MHz and 300 MHz, radiated emission measurements of a tabletop EUT are...
The Artificial Asymmetrical Network (AAN) defined in CISPR 16-1-2 Edition 1.2 (2006–08) is used primarily for the measurement of Common Mode (Asymmetric) conducted emissions on balanced telecommunications cables. In CISPR 22 (now CISPR 32), these AANs are referred to as Impedance Stabilization Networks (ISN). The AAN is intended to control several parameters when installed between the Equipment Under...
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 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...
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...
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...
The PMCHWT-CBFM (Characteristic Basis Function Method) is one of the effective numerical method for radar cross section (RCS) analysis of the electric large scatterer in terms of memory consumption. We analyzed and measured the monostatic RCS of 64-element microstrip array antenna considered as the terminal condition by using the above method. By comparing the conventional PMCHWT and experimental...
The electromagnetic noise radiated from LED bulb and power line becomes one of cause of the EMI problems. The limits value of the magnetic radiation noise from the light illuminated products is established by the measurement of large loop antenna. However, the near magnetic field around the LED bulb was not detected. In this study, the near electric field from LED bulb and power line is measured by...
In this paper, practical test patterns are designed to calculate the characteristics of Through-Silicon Via (TSV) pairs in a silicon interposer. Proposed test patterns include probing pads, traces and TSVs, which are modeled by a combination of impedances and admittances. Performance of the test patterns is obtained from simulation models built in full wave simulation solver. TSV response is then...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.