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.
For differential-signaling system, the ideal balance or symmetrical topology cannot be established due to bend (turnoff point) discontinuities, and hence, an imbalance component is excited. Therefore methodology and geometrical-structure for satisfying both SI and EMI performances are indispensable. In order to provide basic considerations for the realization of methods for predicting and suppressing...
We investigated the effects of millimeter-wave (MMW) electromagnetic fields on neurite outgrowth in PC12VG cells in vitro. We examined the average length of neurites of 160 cells exposed or sham-exposed to 60 GHz MMWs with circular and linear polarizations at average power density of 1 mW/cm2 for two-times of 24 hour exposure. Four parameters, namely the power density, inhomogeneity of the induced...
A novel source identification algorithm has already been proposed and numerically investigated. Where, the unknown source is assumed to be either an electric or a magnetic dipole having an arbitrary location and orientation. It can be either a transient source or a continuous source having unknown spectrum. Any scatterers or media can be present in the space whenever they are reciprocal and fully...
The present study investigates the relationship between the maximal temperature elevation and peak mass-averaged specific absorption rate (SAR) in different human head models, for frequencies ranging from 1 to 10 GHz. A half-wave dipole antenna is considered as a wave source at respective frequencies. Bioheat equation is used to compute the microwave-induced temperature elevation. In the post-processing,...
The rapid expansion of wireless telecommunication service causes a dramatic increment of the amount of electromagnetic field (EMF) exposure in our environment (1). Radiofrequency identification (RFID) has recently been introduced to the wireless RF systems. RFID is also widely used in industrial settings and even throughout daily life (1). There are some workers who may used to be exposed to EMF such...
Physical attacks are a serious threat for secure embedded devices. Attacks based on analysis of electromagnetic emissions of such devices have proven to be particularly dangerous, more than power-based analyses, as they can target even small and specific portion of the chip. The electromagnetic waves can be used effectively also as an active mean of attack, by perturbing the secure computations. In...
Side-Channel Attacks (SCA) are considered a serious threat against embedded cryptography. Therefore security critical chips must be tested for SCA resistance before deployment or certification. SCA are powerful but can need a lot of computation power, especially in the presence of countermeasures. With the advancement of electromagnetic (EM) measurement techniques in side-channel, high quality traces...
In response to the requirement of novel crosstalk-reduction scheme for high density through silicon via(TSV) interconnects in silicon interposer, this paper presents a structure and performance analysis of through-silicon via(TSV) with direct ohmic contact between a ground TSV and silicon substrate for coupling mitigation purposes. We further expand the structure to a 3×3 TSV array and investigate...
In this paper, a novel power plane is proposed using the novel S-shaped bridge electromagnetic bandgap (EBG) structure to isolate the ground bounce noise (GBN) and ultrawideband suppression of simultaneous switching noise (SSN) in high-speed circuit. The S-shaped bridge effectively increases the inductance between two adjacent unit cells. And the ripples are held down by open stub to get higher attenuation...
Meeting radiated electromagnetic emissions requirements can be a significant challenge for engineers designing today's electronic devices. Traditional approaches rely heavily on design rules. However, the optimum circuit board designs often violate well-known design rules, while successfully controlling radiated emissions. This paper describes the application of a design methodology that relates design...
An effective method s proposed to enhance the SI and PI of a power-bus structure PBS) in a layered medium PCB by suppressing the EMI-causing resonance mode It s implemented by a complementary split-ring-resonator as a 1-cel metamaterial-inspired geometry formed in the PBS to remove the resonance that hinders the signal transfer from one layer to another. The method is verified by the full-wave simulation...
Electromagnetic (EM) simulators are commonly used for electromagnetic compatibility and signal integrity (SI) analysis of printed circuit boards (PCB). The accuracy of such analysis depends on the models used for PCB dielectrics and conductors. These models should be broadband and preserve the physical properties of the materials, such as causality and passivity. One such model for dielectrics is...
This paper proposes a design for an electric field (e-field) meter that enables evaluation of the total RF human exposure level in the frequency range from 30 MHz to 3 GHz considering when mobile base stations (BSs) transmit signals at the maximum transmission power in an environment where the transmission power due to the mobile communications traffic changes dynamically. The instantaneous exposure...
This paper proposes the reflection and transmission control structure using the artificially designed materials and a dielectric layer. As the artificially designed material, finite- and infinite-length metal wire array sheets are used here. The reflection and transmission characteristics of the laminated structures are evaluated experimentally in free space.
The current standardized SAR evaluation technique is optimized with respect to the requirements of maximal repeatability and minimal measurement uncertainty. The uncertainty satisfies the requirement of being independent of the source and source-phantom coupling mechanism. These requirements are best achieved by the current SAR evaluation technique that is adaptive and based on 3D scanning of the...
Recently, the application field of a high-speed differential transmission system has expanded, and shielded twisted pair cables (STP cables) are used for the system. Therefore, it is necessary to understand the characteristics of the STP cable. In this paper, we study the relation between noise susceptibility performance of a STP cable and terminal grounding condition of the shield sheath of the STP...
On-board networks with different voltage levels are applied in vehicles equipped with an electrical drive system. Voltages in the range of several hundreds of volts are used in the traction (high-voltage; HV) network. Conventional electronic devices are connected to the low-voltage (LV) network. In the automotive industry, where HV components containing sensors, contactors and communication interfaces,...
Undesired radiation from common mode currents in cables can be reduced by placing the cable on a ground plane. The chassis of a vehicle often consists of several metal sheets, but two adjacent sheets may not be electrically connected along the whole joint. This paper examines the reduced shielding performance due to various types of gaps between two sheets. A solid connection between two sheets is...
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...
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.