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.
In this paper, we report the development of lightning electromagnetic impulse simulator on buildings. This simulator is linked with the counting code VSTL (Virtual Surge Test Lab.) based on the FDTD (Finite Difference Time Domain) method being developed by Central Research Institute of Electric Power Industry. We can analyze the current, voltage and electromagnetic field intensity of buildings which...
The finite difference time domain (FDTD) method was used to study the reduction of electric fields radiated from the gap between two screws embedded in a test bar under an ESD event. It is illustrated that the radiated ESD wave is a near-field phenomenon. It is also illustrated that the electric field radiated from an ESD event decays very quickly at high frequencies. From simulation results, it is...
Vertical grounding rods are usually needed to be appended to a horizontal grounding grid to decrease the grounding resistance. When a lightning current flows through a grounding grid appended by some vertical rods, it's valuable to reasonably arrange these vertical rods to reach an optimum design. In this paper, lightning discharge current distribution among the vertical grounding rods appended to...
In order to research the electromagnetic interference (EMI) in substation, this paper describes constitution of analysis model of EMI in substation secondary cable via which EMI can couple to substation secondary system. Substation cable is modeled by transmission line theory and calculated by finite difference time domain (FDTD) method. External electromagnetic field, lightning strike and busbar...
In this paper, a new path-loss model for WBAN(Wireless Body Area Network) system are investigated. The proposed model has a linear term for more accurate modeling compared to that of the existing WBAN channel model. The simulation frequency is 403.5 MHz for MICS(Medical Implanted Communication Service). The numerical simulation using the Korean phantom model is performed by the commercial tool based...
In this paper, image reconstruction of breast cancer detector using microwave tomography is investigated. The breast cancer detection system under development uses 16 transmit/receive antennas. This is the microwave tomography system operating in the frequency range of 500-3000 MHz. To solve a 2D inverse scattering problem, we tried two methods. One is the method of moment for forward problem and...
A PLRC-FDTD (The piecewise linear recursive convolution-Finite Difference Time Domain) method has been introduced to analyze Multi-conductor transmission lines (MTLs) terminated in frequency dependent loads By using Vector-fitting Method, the admittance of frequency dependent loads can be modeled by rational functions with poles and residues. Based on PLRC method, the voltage and current relation...
An efficient technique using the fast Fourier transform, sum algorithm in combination with the finite-difference time-domain (FDTD) method is proposed for the full-wave analysis of fin-line. In modelling the fin-line, substrate dielectric is treated as a complex permittivity dielectric. Cut-off wavelength, effective dielectric constant, propagation constant and attenuation constant are presented....
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.