| 1. |
- Antonini, Giulio, et al.
(författare)
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A comparative study of PEEC circuit elements computation
- 2003
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Ingår i: IEEE International Symposium on Electromagnetic Compatibility. - Piscataway, NJ : IEEE Communications Society. - 0780377796 ; , s. 810-813
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Konferensbidrag (refereegranskat)abstract
- A key use of the PEEC method is the solution of combined electromagnetic and circuit problems as they occur in many situations in todays very large scale integrated circuits (VLSI) and systems. An important aspect of this approach is the fast and accurate computation of PEEC circuit matrix elements, the partial inductances and normalized coefficients of potential. Recently, fast multipole methods (FMM) have been applied to the PEEC method in the frequency domain as a way to speed up the solution. In this paper, we consider the fast evaluation of the PEEC circuit matrix elements by two different methods, a matrix version of the (FMM) PEEC method and a method, which we call the fast multi-function (FMF) PEEC approach. In this technique, the matrix coefficients are evaluated using analytical functions approximation of the coefficients in combination with a proper choice of numerical quadrature formulas.
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| 2. |
- Antonini, Giulio, et al.
(författare)
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On the passivity of the Delay-Rational Green’s-function-based model for Transmission Lines
- 2019
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Ingår i: Analysis, Probability, Applications, and Computation. - Cham : Springer International Publishing. - 9783030044589 ; , s. 71-81
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Konferensbidrag (refereegranskat)abstract
- In this paper, we study the delay-rational Green’s-function-based (DeRaG) model for transmission lines. This model is described in terms of impedance representation and it contains a rational and a hyperbolic part. The crucial property of transmission lines models is to be passive. The passivity of the rational part has been studied by the authors in a previous work. Here, we extend the results to the rational part of the DeRaG model. Moreover, we prove the passivity of the hyperbolic part.
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| 3. |
- Antonini, Giulio, et al.
(författare)
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Parallel waveform relaxation and matrix solution for large PEEC model problems
- 2007
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Ingår i: 2007 IEEE Electrical Performance of Electronic Packaging. - : IEEE Communications Society. - 9781424408832 ; , s. 241-244
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Konferensbidrag (refereegranskat)abstract
- Excessive compute time is becoming a key problem for high performance system modeling as the complexity of the electromagnetic and circuit models are increasing. At the same time the PEEC models are locally becoming more complex with the increased importance of dielectric and skin-effect losses. Fortunately, parallel processing removes the restriction on the availability of compute resources. In this paper,we consider a combined approach where WR is used for the predominant weak coupling while a Gaussian matrix solver is used for the parallelization of the strongly coupled parts of the overall system.
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| 4. |
- Antonini, Giulio, et al.
(författare)
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PEEC development road map 2007
- 2007
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- A road map for the long term development of the partial element equivalent circuit (PEEC) method is presented. Emerging areas are pointed out together with a solution strategy. Special attention is given to speed up approaches, mesh generation, and time domain stability. The purpose with the road map is to facilitate a unified development of the method into an electromagnetic modeling method suitable for incorporation in integrated analysis tools for engineers for electromagnetic compatibility and electromagnetic interference purpose.
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| 5. |
- Antonini, Giulio, et al.
(författare)
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Waveform relaxation for the parallel solution of large PEEC model problems
- 2007
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Ingår i: 2007 IEEE International Symposium on Electromagnetic Compatibility. - Piscataway, NJ : IEEE Communications Society. - 1424413508
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Konferensbidrag (refereegranskat)abstract
- The solution of large 3D electromagnetic models is important for the modeling of a multitude of EMC, PI and SI problems. In this paper, we explore new algorithms for the parallel solution of large time domain 3D electromagnetic problems. Our approach is to use a volume Partial Element Equivalent Circuit (PEEC) electromagnetic formulation in combination with a Waveform Relaxation (WR) algorithm. In WR, we split the system into smaller subsystems and we break weak couplings so that the problem can be solved iteratively. WR has been used to solve a multitude of different problems. It is especially suited for parallel processing due to its favorable compute time to communication ratio. We consider a specific example for the application of WR to PEEC models.
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| 6. |
- Biello, Elia, et al.
(författare)
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A delay‐rational model of electromagnetic interference on multiconductor transmission lines
- 2018
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Ingår i: International journal of numerical modelling. - : John Wiley & Sons. - 0894-3370 .- 1099-1204. ; 31:4
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Tidskriftsartikel (refereegranskat)abstract
- Multiconductor transmission lines have found a wide range of applications, as power lines, as high‐speed interconnects, and as on‐chip interconnects. Electromagnetic interference (EMI) can be described in terms of plane waves that couple to these lines, leading to unwanted disturbance. This paper presents a delayed spectral formulation for the analysis of plane‐wave coupling to multiconductor transmission lines in both the frequency and time domains, called the DeRaG‐EMI model (short for “delay‐rational model based on Green's functions for electromagnetic interference”). The model is based on Green's functions and is described in terms of delayed differential equations in the time domain. The model is suitable for studying the EMI on multiconductor transmission lines in the case of incident fields. The coupling of a plane wave to a line is described in terms of equivalent sources that account for both the delay of the line and the delays of the incoming plane wave. The delay is explicitly extracted and incorporated into the model with hyperbolic functions. The DeRaG‐EMI model does not require any segmentation of the line. Numerical results confirm its accuracy and its improved performance compared with the previous spectral model and with the inverse fast Fourier transform technique.
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| 7. |
- Cottet, Didier, et al.
(författare)
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EM simulation of planar bus bars in multi-level power converters
- 2012
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Ingår i: EMC Europe 2012. - 9781467307185
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Konferensbidrag (refereegranskat)abstract
- This paper presents recent progress in the acceleration of PEEC based electromagnetic simulations and its impact on the design of complex bus bar structures as used in multi-level power converters. The approach presented consists of providing different dedicated acceleration methods for the different design tasks. The first acceleration technique applied is the so called reluctance matrix method for full 3D field results, reducing memory consumption by orders of magnitude and computing time by a factor 3 to 5. The second acceleration method applied is based on model order reduction techniques for port-to-port impedance extraction, reducing the computation time by several orders of magnitude and allowing wideband macro modeling for system level simulations. The paper focuses on the application of these methods showing the impact on practical bus bar design tasks
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| 8. |
- De Lauretis, Maria, et al.
(författare)
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A Delay-Rational Model of Lossy Multiconductor Transmission Lines with Frequency Independent Per-Unit-Length Parameters
- 2015
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Ingår i: IEEE transactions on electromagnetic compatibility (Print). - 0018-9375 .- 1558-187X. ; 57:5, s. 1235-1245
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Tidskriftsartikel (refereegranskat)abstract
- Cables, printed circuit boards, and VLSI interconnects are commonly modelled as multiconductor transmission lines. Models of electrically long transmission lines are memory and time consuming. In this paper, a robust and efficient algorithmfor the generation of a delay-based model is presented. The impedance representation via the open-end matrix Z is analyzed. In particular, the rational formulation of Z in terms of poles and residues is exploited for both lossless and lossy cases. The delaysof the lines are identified, and explicitly incorporated into the model. A model order reduction of the system is automatically performed, since only a limited number of poles and residues are included in the rational part of the model, whereas the highfrequency behaviour is captured by means of closed expressions that accounts for the delays. The proposed method is applied to two relevant examples and validated through the comparison with reference methods. The time domain solver is found to be more accurate and significantly faster than the one obtained froma pure-rational model.
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| 9. |
- De Lauretis, Maria, 1987-, et al.
(författare)
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A Simulink implementation of the Delay-Rational Green's-Function-based Method for Multiconductor Transmission Lines
- 2018
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Ingår i: EMC Europe 2018. - Piscataway, NJ : Institute of Electrical and Electronics Engineers (IEEE). - 9781467396981 ; , s. 817-822
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Konferensbidrag (refereegranskat)abstract
- The electromagnetic compatibility (EMC) performances of a product can seriously be affected by interconnects. Interconnects can be studied by using the multiconductor transmission lines (MTLs) theory. Mathematical models of MTLs are normally validated with the aid of well-known software, such as MATLAB or PSpice. Simulink is part of the MATLAB suite but is not frequently used, and it is often underestimated both in academia and in the university education. In this paper, we briefly review the mathematical model for MTLs called DeRaG, which is a rational model based on delay extraction. Then, we propose the corresponding Simulink implementation for a 3-conductor transmission line. The Simulink has high readability, is accurate and the simulation time is remarkably faster than the corresponding model obtained in PSpice.
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| 10. |
- De Lauretis, Maria, et al.
(författare)
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A SPICE Realization of the Delay-Rational Green's-Function-based Method for Multiconductor Transmission Lines
- 2016
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Ingår i: IEEE transactions on electromagnetic compatibility (Print). - 0018-9375 .- 1558-187X. ; 58:4, s. 1158-1168
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Tidskriftsartikel (refereegranskat)abstract
- Virtual prototyping has become an unavoidable step in the design of electrical and electronic systems.In this context, time-domain models have to be efficiently embedded in circuit simulator environments, such as SPICE-like transient simulators.Recently, the authors focused on the interconnections, modeled using the multiconductor transmission lines theory, and a Delay-Rational method has been developed, based on Green's functions and line-delay extraction.This work presents a SPICE synthesis of the Delay-Rational method previously developed by the authors.The solution was tested for three transmission lines with frequency-independent per-unit-length parameters.We compared the SPICE results of the Delay-Rational method with those of two standard techniques: one based on a pure rational model and one based on the inverse fast Fourier transform.The time-domain simulations in SPICE of the Delay-Rational method show both accuracy and a remarkable reduction in the number of components used with respect to a purely rational approach, by virtue of the delay extraction.
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