ACES Publication Search
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| Title: | ACES September 2011 Full Journal |
| File Type: | Journal Paper |
| Issue: | Volume: 26 Number: 9 Year: 2011 |
| Download Link: | Click here to download PDF File Size: 4658 KB |
| Title: | ACES September 2011 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 26 Number: 9 Year: 2011 |
| Download Link: | Click here to download PDF File Size: 993 KB |
| Title: | Boundary Element Computation of Line Parameters of On-chip Interconnects on Lossy Silicon Substrate |
| Abstract: | A BEM formulation is applied to the extraction of series parameters of interconnects on lossy silicon substrate. The numerical formulation can take into account both a semi-infinite homogeneous conductive substrate and a homogeneous conductive substrate of finite thickness with backside metallization and needs the discretization of only the contours of the traces. |
| Author(s): | D. Li, L. Di. Rizenzo |
| File Type: | Journal Paper |
| Issue: | Volume: 26 Number: 9 Year: 2011 |
| Download Link: | Click here to download PDF File Size: 1536 KB |
| Title: | Evaluation of Circular Aperture Transmission Coefficients in the Presence Of Obscurations |
| Abstract: | This paper describes a novel parametric approach to the simulation of circular aperture transfer functions in the presence of obscurations at microwave frequencies. A novel virtual ‘absorbing box’ power loss integration technique is applied to successfully demonstrate its validity for conditions where the aperture diameter approaches one tenth of the plate largest dimension. |
| Author(s): | J. G. Davis, P. Shakespeare, N. Kiley |
| File Type: | Journal Paper |
| Issue: | Volume: 26 Number: 9 Year: 2011 |
| Download Link: | Click here to download PDF File Size: 1230 KB |
| Title: | Prospective Method for Partial Discharge Detection in Large AC Machines using Magnetic Sensors in Low Electric Field Zones |
| Abstract: | The aim of the paper is to present a prospective method for on-line monitoring of partial discharge (PD) in large AC motors. The principle of this system consists to measure the weak high frequency magnetic field, due to PD, in the space between the magnetic core and the external frame of large generators. Special sensor, with a bandwidth adapted to the resonance frequencies of the machine winding, can perform such weak-field measurements. With several sensors, it will be possible to localize PD activities corresponding to insulation weaknesses. |
| Author(s): | S. Savin, S. Ait-Amar, D. Roger, G. Vélu |
| File Type: | Journal Paper |
| Issue: | Volume: 26 Number: 9 Year: 2011 |
| Download Link: | Click here to download PDF File Size: 1002 KB |
| Title: | Evaluation of High Frequency Electromagnetic Behavior of Planar Inductor Designs for Resonant Circuits in Switching Power Converters |
| Abstract: | In this paper, a planar inductor based resonant circuit is designed for zero-current switching (ZCS) buck converter. In order to evaluate the actual behavior of the converter at the design stage, a numerical model of the inductor was created and implemented using the finite element (FE) analysis. Using the numerical model, a high frequency physics based circuit model was obtained for the converter’s resonant circuit. The acquired physics based circuit model was used to approximate the electrical behavior of the resonant circuit. The operating condition of the half-wave ZCS buck converter was verified both numerically and experimentally. It was shown that by using the proposed high frequency model, it is possible to evaluate realistic waveforms of voltages and currents including the effects of parasitic elements. This is an essential step for studying conducted electromagnetic field emissions in power converters for the evaluation of their EMI interactions for EMC compliant designs. |
| Author(s): | A. Nejadpak, M. R. Barzegaran, O. A. Mohammed |
| File Type: | Journal Paper |
| Issue: | Volume: 26 Number: 9 Year: 2011 |
| Download Link: | Click here to download PDF File Size: 1329 KB |
| Title: | Improvement of Accuracy of Extraction of Radiation Patterns from FDTD Modelling of Axisymmetrical Antennas |
| Abstract: | This paper presents a discussion on the accuracy of extraction of radiation patterns of BOR antennas from FDTD simulations. The effect of the “main beam shadow” causing errors in extracted back radiation is explained. The methods of its elimination are proposed. |
| Author(s): | M. Olszewska, W. Gwarek |
| File Type: | Journal Paper |
| Issue: | Volume: 26 Number: 9 Year: 2011 |
| Download Link: | Click here to download PDF File Size: 936 KB |
| Title: | Electromagnetic Point Source Reconstruction by Reversed-TLM Method |
| Abstract: | Classical methods for source synthesis are iterative, time consuming, and not always adapted to the desired problem. In this paper, we present a new method of electromagnetic source synthesis based on the time-reversal technique. This approach employs the reversed-TLM method and permits the reconstruction of a source distribution, from its electromagnetic far-field radiation. Point-like source reconstruction results show that by using this method, the “classical” half-wavelength resolution limit is overcome. |
| Author(s): | A. Ungureanu, T. Vuong, F. Ndagijimana |
| File Type: | Journal Paper |
| Issue: | Volume: 26 Number: 9 Year: 2011 |
| Download Link: | Click here to download PDF File Size: 1170 KB |
| Title: | Combined Bowtie–Peano Antennas for Wideband Performance |
| Abstract: | The concept of the folded bowtie wideband antennas is introduced in this paper. To this aim, the design procedure employs a Peano space-filling curve approach which leads to an entire family of combined bowtie-Peano antennas (BPA). The new structures efficiently blend the broadband performance of bowtie antennas with the compactness of Peano forms. In this context, two alternative devices are proposed and thoroughly investigated. Numerical results derived by means of a finite-difference time-domain (FDTD) technique clearly reveal the behavior and the merits of the novel radiators, signifying, also, the feasibility of bandwidth enhancement at specific resonances. |
| Author(s): | I. I. Papadopoulos-Kelidis, A. X. Lalas, N. V. Kantartzis, T. D. Tsiboukis |
| File Type: | Journal Paper |
| Issue: | Volume: 26 Number: 9 Year: 2011 |
| Download Link: | Click here to download PDF File Size: 1502 KB |
| Title: | A Finite Difference Polar-Cartesian Grid Approach for Mode Computation in Rounded-End Waveguides |
| Abstract: | A finite-difference technique to compute Eigenvalues and mode distribution of non standard waveguide (and aperture) is presented. It is based on a mixed mesh (Cartesian-polar) to avoid staircase discretization of curved edges, and is able to give accuracy comparable to FEM and FIT techniques with a reduced computational burden. |
| Author(s): | A. Fanti, G. Mazzarella |
| File Type: | Journal Paper |
| Issue: | Volume: 26 Number: 9 Year: 2011 |
| Download Link: | Click here to download PDF File Size: 994 KB |
| Title: | An Internal Fractional Boundary Placement Model for the Transmission-Line Modeling Method |
| Abstract: | This paper describes a fractional boundary placement model for the transmissionline modeling method enabling the positioning of internal boundaries at non-integer cell locations. The model does not introduce any restriction on the maximum timestep of simulations. The connection of the boundary model to a regular mesh is shown and the model is validated using a band-pass waveguide filter model. Results show good agreement with the analytical solution for the waveguide problem. |
| Author(s): | M. Panitz, C. Christopoulos |
| File Type: | Journal Paper |
| Issue: | Volume: 26 Number: 9 Year: 2011 |
| Download Link: | Click here to download PDF File Size: 1086 KB |
| Title: | Implications of Galilean Electromagnetism in Numerical Modeling |
| Abstract: | The purpose of this article is to present a wider frame to treat the quasi-static limit of Maxwell’s equations. We discuss the fact that there exists not one but indeed two dual Galilean limits, the electric and the magnetic one. We start by a re-examination of the gauge conditions and their compatibility with Lorentz and Galilean covariance. By means of a dimensional analysis on fields and potentials we first emphasize the correct scaling yielding the equations in the two limits. With this particular point of view, the gauge conditions of classical electromagnetism are continuity equations whose range of validity depend on the relativistic or Galilean nature of the underlying phenomenon and have little to do with mathematical closure assumptions taken without physical motivations. We then present the analysis of the quasi-static models in terms of characteristic times and visualize their domains of validity in a suitable diagram. We conclude by few words on the Galilean electrodynamics for moving media, underlying the transformation laws for fields and potentials which are valid in the different limits. |
| Author(s): | F. Rapetti, G. Rousseaux |
| File Type: | Journal Paper |
| Issue: | Volume: 26 Number: 9 Year: 2011 |
| Download Link: | Click here to download PDF File Size: 868 KB |