Gilles Akoun - Academia.edu (original) (raw)

Papers by Gilles Akoun

Research paper thumbnail of Simulation de l'agression électromagnétique sur les composants

Revue de l'Electricité et de l'Electronique, 1997

Research paper thumbnail of Analyse D'Interconnexions Electriques Irregulieres Par Une Approche De Type Peec et Par Le Code Hybride

Research paper thumbnail of Modeling of aeronautic electronic equipments via a PEEC approach and a hybrid code

With the aim of avoiding to discover EMC problems in the last stages of the design process of aer... more With the aim of avoiding to discover EMC problems in the last stages of the design process of aeronautic electronic equipments and respecting the time-to-market requirements, the use of efficient mathematical models is nowadays necessary. Two methodologies for the modeling of 3D complex irregular structures are presented in this paper, with discussion of their performances and examples of their applications.

Research paper thumbnail of «A PEEC-based methodology and a hybrid code for the analysis of 3D irregular interconnects»

Two methodologies for the modeling of 3D complex irregular structures are presented in this paper... more Two methodologies for the modeling of 3D complex irregular structures are presented in this paper, with discussion of their performances and examples of their applications. The first one is based on the PEEC modeling technique in conjunction with a model order reduction method: the PRIMA algorithm, which is necessary for reducing the size of the problem and providing a passive equivalent circuit of the structure analyzable in reasonable time by a SPICE-like circuit simulator. The second methodology uses the so-called "frequency compression" to describe as a multiport the examined structure and the "time compression" to approximate, via Padé polynomials, the terms of the obtained matrix and to interpret it as an equivalent circuit. The two proposed modeling processes are applied to the time-domain analysis of an IEEE challenging delay line problem: the output voltage waveform of a serpentine-shaped trace is calculated and compared to the response of a straight line of the same length. Secondly, we compute in the frequency domain the impedance matrix characterizing a particular structure made of a holed ground plane and a four-legs stripline crossing it in its middle by means of a via.

Research paper thumbnail of A global time domain circuit simulation of a microwave rectenna

International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, 2006

... The design and characterization of a rectenna requires a global analysis *Correspondence to:L... more ... The design and characterization of a rectenna requires a global analysis *Correspondence to:Lionel Pichon, LGEP, UMRS 8507 CNRS, SUPELEC, Universite ... An approximate expressionZk of Z is searched by dividing the whole frequency band O into Nb intervals Ok (14k4Nb) ...

Research paper thumbnail of Numerical simulation of an electromagnetic aggression on a FACT component and investigation on package effect

RADECS 97. Fourth European Conference on Radiation and its Effects on Components and Systems (Cat. No.97TH8294), 1998

This paper presents different approaches made by numerical simulation to study the behavior of el... more This paper presents different approaches made by numerical simulation to study the behavior of electronic components and the effect of their package, when submitted to an ElectroMagnetic (EM) aggression. The simulations are performed using several codes: DESSIS-ISE, SPICE, ELF3D and ELFI3S. The EM susceptibility of an input buffer (FACT technology) is investigated. Continuous Wave (CW) type aggressions with different frequencies

Research paper thumbnail of Fast Analysis of a Broad-Band Microwave Rectenna Using 3-D FEM and Padé Approximation

IEEE Transactions on Magnetics, 2000

In this paper, a computationally efficient model of a broad band microwave rectenna is presented.... more In this paper, a computationally efficient model of a broad band microwave rectenna is presented. A rectenna is a microwave power receiver: it includes a rectifying circuit and an antenna. In this paper, the combination of a 3-D edge finite-element method with a Padé rational approximation procedure allows a fast characterization of the antenna over the wide frequency band. Then an equivalent circuit of the whole device including distributed parts and lumped nonlinear components is easily obtained. A global circuit time domain simulation of the rectenna with PSPICE is thus available.

Research paper thumbnail of Interconnect Macromodeling From 3-D Field Computation

IEEE Transactions on Magnetics, 2000

This paper presents a macromodeling technique allowing a global circuit simulation of electromagn... more This paper presents a macromodeling technique allowing a global circuit simulation of electromagnetic problems. In the proposed methodology the whole 3-D structure can be subdivided into smaller parts. Each part is characterized by an equivalent circuit deduced from wide-band analysis. The connection between the substructures makes available a global simulation of the whole system inside a circuit platform (SPICE for example). The ability of the approach is demonstrated in case of different kinds of interconnects (tracks and cables).

Research paper thumbnail of 3D analytical calculation of the forces exerted between two cuboidal magnets

IEEE Transactions on Magnetics, 1984

The interaction forces exerted between permanent magnets are used in many magneto-mechanical devi... more The interaction forces exerted between permanent magnets are used in many magneto-mechanical devices (magnetic bearings, couplings, etc ... ). By analytical calculation, 2D problems can be solved easily, when simple shaped magnets are used. Usually, the 3D problems are numerically computed, by using a finite element method for example.

Research paper thumbnail of An efficient global analysis of a rectenna using the combination of a full-wave model and a rational approximation

The European Physical Journal Applied Physics, 2005

ABSTRACT

Research paper thumbnail of Electromagnetic Modelling of Large Scale Structures with non Linear Devices

submitted to EMC …, 2010

The introduction of new materials in large structures as aircrafts has considerably changed the q... more The introduction of new materials in large structures as aircrafts has considerably changed the qualification of systems. In particular, electrical systems have to be robust in a more severe environment than for metallic airplanes. This is mainly due to the presence of composite materials inside the structure. This paper deals with EMC inside the system and presents a methodology to take into account the structure effects and equipment modelling. The originality is to perform frequency domain simulation for 3D structure, approximations of the frequency domain responses with hybrid code or vector fitting techniques and solve the full system with non linear device in the time domain.

Research paper thumbnail of Simulation de l'agression électromagnétique sur les composants

Revue de l'Electricité et de l'Electronique, 1997

Research paper thumbnail of Analyse D'Interconnexions Electriques Irregulieres Par Une Approche De Type Peec et Par Le Code Hybride

Research paper thumbnail of Modeling of aeronautic electronic equipments via a PEEC approach and a hybrid code

With the aim of avoiding to discover EMC problems in the last stages of the design process of aer... more With the aim of avoiding to discover EMC problems in the last stages of the design process of aeronautic electronic equipments and respecting the time-to-market requirements, the use of efficient mathematical models is nowadays necessary. Two methodologies for the modeling of 3D complex irregular structures are presented in this paper, with discussion of their performances and examples of their applications.

Research paper thumbnail of «A PEEC-based methodology and a hybrid code for the analysis of 3D irregular interconnects»

Two methodologies for the modeling of 3D complex irregular structures are presented in this paper... more Two methodologies for the modeling of 3D complex irregular structures are presented in this paper, with discussion of their performances and examples of their applications. The first one is based on the PEEC modeling technique in conjunction with a model order reduction method: the PRIMA algorithm, which is necessary for reducing the size of the problem and providing a passive equivalent circuit of the structure analyzable in reasonable time by a SPICE-like circuit simulator. The second methodology uses the so-called "frequency compression" to describe as a multiport the examined structure and the "time compression" to approximate, via Padé polynomials, the terms of the obtained matrix and to interpret it as an equivalent circuit. The two proposed modeling processes are applied to the time-domain analysis of an IEEE challenging delay line problem: the output voltage waveform of a serpentine-shaped trace is calculated and compared to the response of a straight line of the same length. Secondly, we compute in the frequency domain the impedance matrix characterizing a particular structure made of a holed ground plane and a four-legs stripline crossing it in its middle by means of a via.

Research paper thumbnail of A global time domain circuit simulation of a microwave rectenna

International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, 2006

... The design and characterization of a rectenna requires a global analysis *Correspondence to:L... more ... The design and characterization of a rectenna requires a global analysis *Correspondence to:Lionel Pichon, LGEP, UMRS 8507 CNRS, SUPELEC, Universite ... An approximate expressionZk of Z is searched by dividing the whole frequency band O into Nb intervals Ok (14k4Nb) ...

Research paper thumbnail of Numerical simulation of an electromagnetic aggression on a FACT component and investigation on package effect

RADECS 97. Fourth European Conference on Radiation and its Effects on Components and Systems (Cat. No.97TH8294), 1998

This paper presents different approaches made by numerical simulation to study the behavior of el... more This paper presents different approaches made by numerical simulation to study the behavior of electronic components and the effect of their package, when submitted to an ElectroMagnetic (EM) aggression. The simulations are performed using several codes: DESSIS-ISE, SPICE, ELF3D and ELFI3S. The EM susceptibility of an input buffer (FACT technology) is investigated. Continuous Wave (CW) type aggressions with different frequencies

Research paper thumbnail of Fast Analysis of a Broad-Band Microwave Rectenna Using 3-D FEM and Padé Approximation

IEEE Transactions on Magnetics, 2000

In this paper, a computationally efficient model of a broad band microwave rectenna is presented.... more In this paper, a computationally efficient model of a broad band microwave rectenna is presented. A rectenna is a microwave power receiver: it includes a rectifying circuit and an antenna. In this paper, the combination of a 3-D edge finite-element method with a Padé rational approximation procedure allows a fast characterization of the antenna over the wide frequency band. Then an equivalent circuit of the whole device including distributed parts and lumped nonlinear components is easily obtained. A global circuit time domain simulation of the rectenna with PSPICE is thus available.

Research paper thumbnail of Interconnect Macromodeling From 3-D Field Computation

IEEE Transactions on Magnetics, 2000

This paper presents a macromodeling technique allowing a global circuit simulation of electromagn... more This paper presents a macromodeling technique allowing a global circuit simulation of electromagnetic problems. In the proposed methodology the whole 3-D structure can be subdivided into smaller parts. Each part is characterized by an equivalent circuit deduced from wide-band analysis. The connection between the substructures makes available a global simulation of the whole system inside a circuit platform (SPICE for example). The ability of the approach is demonstrated in case of different kinds of interconnects (tracks and cables).

Research paper thumbnail of 3D analytical calculation of the forces exerted between two cuboidal magnets

IEEE Transactions on Magnetics, 1984

The interaction forces exerted between permanent magnets are used in many magneto-mechanical devi... more The interaction forces exerted between permanent magnets are used in many magneto-mechanical devices (magnetic bearings, couplings, etc ... ). By analytical calculation, 2D problems can be solved easily, when simple shaped magnets are used. Usually, the 3D problems are numerically computed, by using a finite element method for example.

Research paper thumbnail of An efficient global analysis of a rectenna using the combination of a full-wave model and a rational approximation

The European Physical Journal Applied Physics, 2005

ABSTRACT

Research paper thumbnail of Electromagnetic Modelling of Large Scale Structures with non Linear Devices

submitted to EMC …, 2010

The introduction of new materials in large structures as aircrafts has considerably changed the q... more The introduction of new materials in large structures as aircrafts has considerably changed the qualification of systems. In particular, electrical systems have to be robust in a more severe environment than for metallic airplanes. This is mainly due to the presence of composite materials inside the structure. This paper deals with EMC inside the system and presents a methodology to take into account the structure effects and equipment modelling. The originality is to perform frequency domain simulation for 3D structure, approximations of the frequency domain responses with hybrid code or vector fitting techniques and solve the full system with non linear device in the time domain.