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This paper describes that the ferromagnetic resonance (FMR) frequency shift can be calculated by an electromagnetic field simulator based on the Maxwell's equation although the relative permeability and the FMR frequency is defined by the Landau-Lifshitz-Gilbert (LLG) and the Kittel's equation. We evaluate the magnetic circuit model with the leakage magnetic flux path for considering the demagnetizing...
The MMW (Millimeter-wave 30 GHz ? 300 GHz) exposure is limited by ICNIRP guideline. Provided guideline for MMW band is based on small amount of data, therefore accumulation of data is desired to evaluate the validity of the guideline. The ocular injure caused by MMW exposure is highly depend on the temperature elevation in the anterior part of the ocular tissue with the complicated structure. The...
This paper describes an original methodology for the modeling of parasitic inductive couplings. The key idea is the use of magnetic hooks which are gates for magnetic fluxes that cross conductive loops and consequently induce parasitic voltages, thus disturbing the signal integrity. The multiple connected domains of integrated circuits are modeled by a Magneto-Electric-Equivalent-Circuit (MEEC), consisting...
Since the loss of input rectifying diode bridge in the conventional PFC circuit reduces the efficiency, the bridgeless PFC circuit has been proposed. However, the performances of EMC in some bridgeless PFC circuits are unsatisfactory. In order to improve noise performance, the noise mechanism should be investigated as the first step. In this study, common mode noise current of conventional bridge...
This paper describes a methodology for modeling of EM coupling on an aircraft Electrical Wiring Interconnection System (EWIS). The challenge is to be able to generate an operatory model taking into account the large number of cables and to maintain a reasonable computation time for the evaluation of the distribution of currents at the interface of equipment pieces. For this, a geometrical condensation...
Shielding effective (SE) evaluations inside multiple cavities consisted of various coupling paths have been presented. Modeling based on electromagnetic topology (EMT) is performed to solve the problem fast and efficiently. A minimally invasive electric field measurement system by using an electro-optic sensor which can minimize the invasiveness of internal field is proposed. Results given by simulations...
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,...
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...
Electromagnetic Compatibility (EMC) is a challenging task in today's highly developed electronics. Near-field scanning provides an insight into the physical behavior of circuits and thus allows understanding the problems. Therefore, near-field scanning enables a well-directed optimization regarding EMC in electronic systems. It is a thorough task to gain the electric and magnetic fields from the measured...
This paper proposes an inductance extraction method for a compact meander line structure. The Green House algorithm is introduced to solve the complicated inductive coupling effects and make it possible to calculate a meander line with any shape. Three different cases with a meander line or a straight line as a return path are discussed. Self and mutual inductances are demonstrated based on partial...
A discrete optimization using a genetic algorithm (GA) for electromagnetic interference (EMI) f ler design is presented in this paper. Using a macro-model in the frequency domain this approach takes into account the load impedance and the source emissions. The macro-model includes an accurate filter model that takes into account the PCB stray elements and the passive components high frequency complex...
In the paper a characteristics of propagation conditions in the container terminal environment is presented. The investigated environment is characterized on the example of Gdansk Deepwater Container Terminal in Poland. An empirical propagation model for path loss calculation in mobile radio links in a container terminal environment is presented.
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