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Hartman, A., Antonini, G., Ekman, J. & De Lauretis, M. (2019). Bandlimited Distortionless Material Design by an Approximation of the Heaviside Condition. IEEE transactions on electromagnetic compatibility (Print)
Open this publication in new window or tab >>Bandlimited Distortionless Material Design by an Approximation of the Heaviside Condition
2019 (English)In: IEEE transactions on electromagnetic compatibility (Print), ISSN 0018-9375, E-ISSN 1558-187XArticle in journal (Refereed) Epub ahead of print
Abstract [en]

The distortionless propagation of signals in a medium offers a way to preserve the signal integrity. There exists a condition for distortionless propagation on a transmission line known as the Heaviside condition. This paper proposes the use of the Heaviside condition to characterize and design magneto-dielectric materials that provide distortionless propagation in a specified finite frequency band. Plane wave propagation in a magneto-dielectric material is modeled by a transmission line model, thereby assuming transverse electromagnetic mode propagation. Then, the Heaviside condition is employed to derive the frequency-dependent permittivity and permeability functions of the material in rational form, so they satisfy the condition in a specified frequency interval. A procedure to design such materials is described. A numerical example of the design process is provided and an illustration of the effectiveness of modeled material in fulfilling the Heaviside condition in a specified frequency interval both in the time and frequency domains is given, indicating the validity of the approximation. The design procedure is as such a suitable preliminary design guide for deriving a realizable description of a magnetodielectric, exhibiting the distortionless property in the desired frequency interval, with certain specified requirements put on the loss, or the permeability and permittivity values satisfied. The obtained results may initiate further investigations into the bandwidth restrictions of the approximation, on closed-form design solutions, and the practical realization of such materials.

Place, publisher, year, edition, pages
IEEE, 2019
Keywords
Dispersive media, distortionless propagation, Heaviside condition, magneto-dielectric media
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electronic systems
Identifiers
urn:nbn:se:ltu:diva-75287 (URN)10.1109/TEMC.2019.2910761 (DOI)
Available from: 2019-07-11 Created: 2019-07-11 Last updated: 2019-07-11
Antonini, G., De Lauretis, M., Ekman, J. & Miroshnikova, E. (2019). On the passivity of the Delay-Rational Green’s-function-based model for Transmission Lines. In: Karl‐Olof Lindahl,Torsten Lindström, Luigi G. Rodino, Joachim Toft, Patrik Wahlberg (Ed.), Analysis, Probability, Applications, and Computation: Proceedings of the 11th ISAAC Congress. Paper presented at ISAAC 2017 Växjö, Sweden (pp. 71-81).
Open this publication in new window or tab >>On the passivity of the Delay-Rational Green’s-function-based model for Transmission Lines
2019 (English)In: Analysis, Probability, Applications, and Computation: Proceedings of the 11th ISAAC Congress / [ed] Karl‐Olof Lindahl,Torsten Lindström, Luigi G. Rodino, Joachim Toft, Patrik Wahlberg, 2019, p. 71-81Conference paper, Published paper (Refereed)
Abstract [en]

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. 

National Category
Engineering and Technology Other Electrical Engineering, Electronic Engineering, Information Engineering Mathematical Analysis
Research subject
Industrial Electronics; Mathematics
Identifiers
urn:nbn:se:ltu:diva-68946 (URN)10.1007/978-3-030-04459-6_7 (DOI)2-s2.0-85065430825 (Scopus ID)978-3-030-04458-9 (ISBN)
Conference
ISAAC 2017 Växjö, Sweden
Note

Ingår i bokserien Trends in Mathematics

Available from: 2018-05-28 Created: 2018-05-28 Last updated: 2019-06-25Bibliographically approved
Romano, D., Kovačević-Badstübner, I., Parise, M., Grossner, U., Ekman, J. & Antonini, G. (2019). Rigorous dc Solution of Partial Element Equivalent Circuit Models Including Conductive, Dielectric, and Magnetic Materials. IEEE transactions on electromagnetic compatibility (Print)
Open this publication in new window or tab >>Rigorous dc Solution of Partial Element Equivalent Circuit Models Including Conductive, Dielectric, and Magnetic Materials
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2019 (English)In: IEEE transactions on electromagnetic compatibility (Print), ISSN 0018-9375, E-ISSN 1558-187XArticle in journal (Refereed) Epub ahead of print
Abstract [en]

This paper presents a rigorous derivation of the dc solution of three-dimensional partial element equivalent circuit (PEEC) formulation extended to include simultaneously conductive, dielectric, and magnetic materials. The circuit interpretation of Maxwell’s equations provided by the PEEC method allows to reformulate the dc modeling task in such a way that physical phenomena are fully exploited. Indeed, since the displacements currents are identically zero in dielectrics, Kirchhoff’s current law is enforced in terms of charge conservation internally to dielectrics or at the interface between dielectrics and other materials. A well-posed problem is achieved by adding the charges as new unknowns and identifying the disconnected objects. Two numerical examples are presented demonstrating the accuracy of the proposed method when compared to the dc solution as extracted by the fast Fourier transform of the impulse response and a finite element method simulation.

Place, publisher, year, edition, pages
IEEE, 2019
Keywords
dc solution, partial element equivalent circuit (PEEC) method
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electronic systems
Identifiers
urn:nbn:se:ltu:diva-75290 (URN)10.1109/TEMC.2019.2919759 (DOI)
Available from: 2019-07-11 Created: 2019-07-11 Last updated: 2019-07-11
Kovačević-Badstübner, I., Grossner, U., Romano, D., Antonini, G. & Ekman, J. (2018). A more accurate electromagnetic modeling of WBG power modules. In: Proceedings of the International Symposium on Power Semiconductor Devices and ICs: . Paper presented at 30th IEEE International Symposium on Power Semiconductor Devices and ICs (ISPSD), Chicago, IL, USA, 13-17 May, 2018 (pp. 260-263). Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>A more accurate electromagnetic modeling of WBG power modules
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2018 (English)In: Proceedings of the International Symposium on Power Semiconductor Devices and ICs, Institute of Electrical and Electronics Engineers (IEEE), 2018, p. 260-263Conference paper, Published paper (Refereed)
Abstract [en]

A major requirement for further development of wide-band gap (WBG) power devices and their applications is the optimization of packages and PCB layouts to enable fast-switching capabilities. Electromagnetic modelling allows the prediction of parasitic inductances, capacitances, and resistances of the current paths within power modules, which cannot be easily approached in measurements. As a result, electromagnetic-circuit-coupled modeling enables the optimization of package layouts and interconnections before manufacturing actual power modules. The accuracy and limitations of present numerical techniques for three-dimensional (3D) electromagnetic modeling of power modules is still neither well understood nor verified. This paper presents the extraction of parasitics of power semiconductor packages using two electromagnetic modelling approaches. The first approach is based on a well-established 3D electromagnetic quasi-static solver, ANSYS Q3D Extractor. For the second approach, a numerical solver based on the Partial Element Equivalent Circuit (PEEC) method is developed and assessed in terms of modelling accuracy required by fast switching WBG-based power converters. The PEEC method is presented as a promising numerical technique, which can potentially be used to overcome the limitations of the EM modeling based on the ANSYS Q3D Extractor.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-70373 (URN)10.1109/ISPSD.2018.8393652 (DOI)000467075700064 ()978-1-5386-2927-7 (ISBN)
Conference
30th IEEE International Symposium on Power Semiconductor Devices and ICs (ISPSD), Chicago, IL, USA, 13-17 May, 2018
Available from: 2018-08-14 Created: 2018-08-14 Last updated: 2019-06-12Bibliographically approved
De Lauretis, M., Antonini, G. & Ekman, J. (2018). A Simulink implementation of the Delay-Rational Green's-Function-based Method for Multiconductor Transmission Lines. In: EMC Europe 2018: . Paper presented at International Symposium and Exhibition on Electromagnetic Compatibility, Amsterdam, August 27-30, 2018 (pp. 817-822). Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), Article ID 8485071.
Open this publication in new window or tab >>A Simulink implementation of the Delay-Rational Green's-Function-based Method for Multiconductor Transmission Lines
2018 (English)In: EMC Europe 2018, Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2018, p. 817-822, article id 8485071Conference paper, Published paper (Refereed)
Abstract [en]

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.

Place, publisher, year, edition, pages
Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2018
Series
IEEE International Symposium on Electromagnetic Compatibility, ISSN 2158-110X
Keywords
Transmission lines, MATLAB/Simulink, SPICE, transient simulations
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-69302 (URN)10.1109/EMCEurope.2018.8485071 (DOI)000454901100150 ()2-s2.0-85056136450 (Scopus ID)978-1-4673-9698-1 (ISBN)
Conference
International Symposium and Exhibition on Electromagnetic Compatibility, Amsterdam, August 27-30, 2018
Available from: 2018-08-20 Created: 2018-08-20 Last updated: 2019-01-28Bibliographically approved
Kovačević-Badstübner, I., Romano, D., Antonini, G., Ekman, J. & Grossner, U. (2018). Electromagnetic Modeling Approaches Towards Virtual Prototyping of WBG Power Electronics. In: 2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia): . Paper presented at 2018 International Power Electronics Conference, 20-24 May 2018,Niigata, Japan (pp. 3588-3595). Piscataway, NJ: IEEE, Article ID 8507365.
Open this publication in new window or tab >>Electromagnetic Modeling Approaches Towards Virtual Prototyping of WBG Power Electronics
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2018 (English)In: 2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia), Piscataway, NJ: IEEE, 2018, p. 3588-3595, article id 8507365Conference paper, Published paper (Refereed)
Abstract [en]

High frequency power electronics utilizing wide-band gap semiconductor devices imposes more stringent requirements for highly accurate extraction of parasitics of power electronics systems in a wide frequency range. This paper presents the state-of-the-art modeling approaches used to predict the electromagnetic behavior of power electronic systems and components in terms of accuracy and computational cost. The potential of the Partial Element Equivalent Circuit (PEEC) technique for virtual prototyping of power electronic systems is assessed. The main advantage of this numerical technique is its capability for direct coupling between the circuit and electromagnetic domains provided by the PEEC meshing of three-dimensional geometries in partial elements. The aim of this paper is to provide a more comprehensive understanding of PEEC-based modeling for power electronics packaging.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE, 2018
Series
International Conference on Power Electronics, ISSN 2150-6078
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-71409 (URN)10.23919/IPEC.2018.8507365 (DOI)000449328903086 ()2-s2.0-85057342975 (Scopus ID)978-4-88686-405-5 (ISBN)
Conference
2018 International Power Electronics Conference, 20-24 May 2018,Niigata, Japan
Available from: 2018-11-01 Created: 2018-11-01 Last updated: 2019-01-14Bibliographically approved
Hartman, A., Romano, D., Antonini, G. & Ekman, J. (2018). Partial Element Equivalent Circuit Models of Three-Dimensional Geometries Including Anisotropic Dielectrics. IEEE transactions on electromagnetic compatibility (Print), 60(3), 696-704
Open this publication in new window or tab >>Partial Element Equivalent Circuit Models of Three-Dimensional Geometries Including Anisotropic Dielectrics
2018 (English)In: IEEE transactions on electromagnetic compatibility (Print), ISSN 0018-9375, E-ISSN 1558-187X, Vol. 60, no 3, p. 696-704Article in journal (Refereed) Published
Abstract [en]

During recent years anisotropic materials have received an increasing interest and found important applications in the field of shielding and antennas. The anisotropy may be due to intrinsic properties, or as a consequence of mixing. Intentionally or not, the anisotropy impacts the electromagnetic (EM) behavior of a system. Therefore, it is desirable to be able to incorporate the anisotropic effects in an EM model, to allow design tasks and analysis. In this paper, the partial element equivalent circuit (PEEC) formulation is extended to handle nondispersive linear anisotropic dielectrics. The anisotropic dielectric PEEC cell is derived and the resulting PEEC equations are developed into a descriptor system form, which is well suited for implementation in SPICE-like solvers, and for reduction by model-order reduction techniques. A verification of the model is given by a numerical example of a patch antenna situated on an anisotropic substrate and the results are in good agreement with a finite-difference time-domain implementation. The proposed PEEC model is of interest for further work, i.e., in the modeling of setups involving mixtures of materials, with an orientational alignment, and engineered materials, encountered in different EM compatibility applications.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-65639 (URN)10.1109/TEMC.2017.2724071 (DOI)000422793900018 ()2-s2.0-85028449937 (Scopus ID)
Note

Validerad;2018;Nivå 2;2018-01-25 (andbra)

Available from: 2017-09-14 Created: 2017-09-14 Last updated: 2019-01-17Bibliographically approved
Hartman, A., Ekman, J., Lang, D., Romano, D. & Antonini, G. (2018). PEEC Models of Printed Antennas in Condition Monitoring Applications Covered by Dielectrics with Temperature-Dependent Permittivity. In: 2018 International Symposium on Electromagnetic Compatibility (EMC EUROPE): . Paper presented at International Symposium on Electromagnetic Compatibility, EMC Europe 2018, Amsterdam, The Netherlands, 27-30 August 2018 (pp. 343-348). Piscataway, NJ: IEEE, Article ID 8485032.
Open this publication in new window or tab >>PEEC Models of Printed Antennas in Condition Monitoring Applications Covered by Dielectrics with Temperature-Dependent Permittivity
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2018 (English)In: 2018 International Symposium on Electromagnetic Compatibility (EMC EUROPE), Piscataway, NJ: IEEE, 2018, p. 343-348, article id 8485032Conference paper, Published paper (Refereed)
Abstract [en]

In wireless condition monitoring systems the antenna serves as a critical part of the data transmission link. A condition monitoring application usually pose a challenging environment for an antenna system, as they are often found in harsh machine environments. As conventional antennas usually are designed for free-space operation and for some design temperature range, the presence of additional materials and their temperature variation are commonly not accounted for. In this paper an attempt to highlight the impact of materials' temperature-dependence, in their electrical properties, on printed antenna characteristics is presented. Partial element equivalent circuit models of a common printed antenna design are developed. By incorporating temperature-dependent permittivity models of pure water, and a mixture of an industrial lubricant and water, the impact on the antenna's resonant behavior is demonstrated. The numerical examples highlight that the temperature variation in the permittivity of materials surrounding the printed antenna may impact the antenna characteristics enough to be considered in the design, if a degradation in performance is not an option.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE, 2018
Series
IEEE International Symposium on Electromagnetic Compatibility, ISSN 2158-110X
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-72331 (URN)10.1109/EMCEurope.2018.8485032 (DOI)000454901100065 ()2-s2.0-85056091979 (Scopus ID)978-1-4673-9698-1 (ISBN)
Conference
International Symposium on Electromagnetic Compatibility, EMC Europe 2018, Amsterdam, The Netherlands, 27-30 August 2018
Available from: 2018-12-19 Created: 2018-12-19 Last updated: 2019-01-28Bibliographically approved
Hartman, A., Ekman, J., Antonini, G. & Romano, D. (2016). A Descriptor Form Implementation of PEEC Models Incorporating Dispersive and Lossy Dielectrics (ed.). In: (Ed.), 2016 IEEE International Symposium on Electromagnetic Compatibility (EMC): Otawa, Canada, 25-29 July 2016. Paper presented at IEEE International Symposium on Electromagnetic Compatibility : 25/07/2016 - 29/07/2016 (pp. 206-211). Piscataway, NJ: IEEE Computer Society, Article ID 7571645.
Open this publication in new window or tab >>A Descriptor Form Implementation of PEEC Models Incorporating Dispersive and Lossy Dielectrics
2016 (English)In: 2016 IEEE International Symposium on Electromagnetic Compatibility (EMC): Otawa, Canada, 25-29 July 2016, Piscataway, NJ: IEEE Computer Society, 2016, p. 206-211, article id 7571645Conference paper, Published paper (Refereed)
Abstract [en]

With rising frequencies involved in electronics, losses and dispersion exhibited by dielectrics become important to consider in electromagnetic modeling. The Partial Element Equivalent Circuit (PEEC) method is suitable for a mixed electromagnetic and circuit setting, forming equivalent circuits that can be interconnected with circuit elements. In this paper, a descriptor form representation of PEEC models incorporatingdispersive and lossy dielectrics is developed. By representing the electrical permittivity with a Debye-Lorentz model equivalent circuits can be synthesized. The synthesized circuits for the permittivity are included in the PEEC equations by formulating the circuit equations for the additional circuit unknowns. This yields an input/output formulation that can handle an arbitrary number of finite dielectrics and be integrated by any kind of integration scheme. Furthermore, it offers a straightforward way to incorporate lossy and dispersive dielectrics into a PEEC solver compared to using recursive convolution. The proposed descriptor form representation is tested for a setup consisting of three microstrips over a ground plane, separated by a dielectric substrate. Both the ideal and the lossy and dispersive case are tested and compared. Furthermore, the proposed formulation is verified against an existing implementation in the frequency domain. Good agreement between the proposed formulation andthe existing frequency-domain PEEC formulation is obtained.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE Computer Society, 2016
Series
IEEE International Symposium on Electromagnetic Compatibility, ISSN 2158-110X
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-38090 (URN)10.1109/ISEMC.2016.7571645 (DOI)000387117700061 ()2-s2.0-84990982208 (Scopus ID)c5b527d2-5891-44b8-8ef3-78de432285db (Local ID)978-1-5090-1442-2 (ISBN)c5b527d2-5891-44b8-8ef3-78de432285db (Archive number)c5b527d2-5891-44b8-8ef3-78de432285db (OAI)
Conference
IEEE International Symposium on Electromagnetic Compatibility : 25/07/2016 - 29/07/2016
Note

Validerad; 2016; Nivå 1; 2016-12-01 (andbra)

Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2019-01-17Bibliographically approved
De Lauretis, M., Ekman, J. & Antonini, G. (2016). A SPICE Realization of the Delay-Rational Green's-Function-based Method for Multiconductor Transmission Lines (ed.). IEEE transactions on electromagnetic compatibility (Print), 58(4), 1158-1168
Open this publication in new window or tab >>A SPICE Realization of the Delay-Rational Green's-Function-based Method for Multiconductor Transmission Lines
2016 (English)In: IEEE transactions on electromagnetic compatibility (Print), ISSN 0018-9375, E-ISSN 1558-187X, Vol. 58, no 4, p. 1158-1168Article in journal (Refereed) Published
Abstract [en]

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.

Keywords
Transmission lines, interconnections, SPICE, Technology - Electrical engineering, electronics and photonics, Teknikvetenskap - Elektroteknik, elektronik och fotonik
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-7309 (URN)10.1109/TEMC.2016.2546552 (DOI)000381435700026 ()2-s2.0-84981765159 (Scopus ID)5a7bbb0a-150d-4d5a-b071-e36775096c8b (Local ID)5a7bbb0a-150d-4d5a-b071-e36775096c8b (Archive number)5a7bbb0a-150d-4d5a-b071-e36775096c8b (OAI)
Note

Validerad; 2016; Nivå 2; 20160129 (mardel)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-09-28Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0003-4160-214x

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