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A hybrid method for simulation of mixed circuit and electromagnetic problems in frequency domain
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.ORCID iD: 0000-0003-4160-214X
2013 (English)Conference paper, Oral presentation only (Refereed)
Abstract [en]

The simulation of mixed circuit and electromagnetic (EM) structures in frequency domain has application in most electromagnetic problems. Many of the developed methods work by modifying a SPICE-like solver to incorporate an EM numerical method, or to extend the EM numerical method to handle the circuit components (e.g. diodes, transistors, ..) by re-implementing their model definitions. In order to find the frequency response of the system, a DC bias point calculation is required for which a novel hybrid technique has been proposed. This technique utilizes the Partial Element Equivalent Circuit (PEEC) method as the EM solver and employs OrCAD as the circuit solver. The link between the two solvers is acquired by defining the circuits connected to the EM structure as ports. Each port’s current-voltage relations are approximated by a linear system of equations and the Newton-Raphson algorithm is employed to calculate the bias point of the whole structure. Having the bias points, the frequency behavior of the system is acquired by calculating the admittance models of the ports using OrCAD. To demonstrate the capability of the developed method, a high frequency amplifier circuit connected to two transmission lines is examined. The results show good agreement and acceptable accuracy has been obtained that shows the feasibility of the developed method to solve this type of mixed problems. Since OrCAD is held responsible for the circuit simulations, the need to modify a SPICE-like solver or to re-implement the definitions of the circuit devices has been removed. On the other hand, by manipulating the system of equations and proper optimization techniques, an optimal solver can be achieved.

Place, publisher, year, edition, pages
2013.
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
URN: urn:nbn:se:ltu:diva-34646Local ID: 8e78b96d-d515-4447-a40f-5434f0c3decdOAI: oai:DiVA.org:ltu-34646DiVA: diva2:1007897
Conference
International Review of Progress in Applied Computational Electromagnetics : 24/03/2013 - 28/03/2013
Projects
Full-wave electromagnetic modeling with active circuit elements
Note
Godkänd; 2013; 20130121 (sohsaf)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-10-19Bibliographically approved

Open Access in DiVA

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Safavi, SohrabEkman, Jonas
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CiteExportLink to record
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Citation style
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