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- Ekman, Jonas, et al.
(författare)
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Toward improved time domain stability and passivity for full-wave PEEC models
- 2006
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Ingår i: 2006 IEEE International Symposium on Electromagnetic Compatibility. - Piscataway, NJ : IEEE Communications Society. - 142440293X ; , s. 544-549
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Konferensbidrag (refereegranskat)abstract
- It is well known that time domain integral equation techniques may suffer from stability problems and frequency domain models may provide non-passive results. A main source of these issues is the delay of the coupled elements. In the classical Partial Element Equivalent Circuit (PEEC) method, a single delay was used for each couple of partial element which results in a delay differential equation with reduced stability and accuracy. In this paper, we consider multiple delay coefficients which can be used for both the time and frequency domain. Also, filters are introduced which remove unwanted eigenvalues or resonances in the partial element couplings. This can substantially improve the response of the frequency domain and the time domain models. Stability improvements also means passivity improvements.
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| 3. |
- Ruehli, A.E., et al.
(författare)
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Neutral delay differential equations from the PEEC circuit solution of Maxwell's equation
- 2006
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Ingår i: 6th IFAC Workshop on Time Delay Systems 2006. - Red Hook : Curran Associates, Inc.. - 9781605607573 ; , s. 217-222
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Konferensbidrag (refereegranskat)abstract
- The purpose of this paper is twofold. First, we present the Partial Element Equivalent Circuit (PEEC) formulation of Maxwell's equations. Second, the resultant system of neutral delay differential equations (NDDEs), arising from the time domain solution of PEEC models, and the stability of these are considered. In the classical PEEC model, single delay approximations were used for the partial elements describing the electric- and magnetic field couplings. It was shown that the resultant system of delay differential equations may become unstable for some time domain applications. In this paper, we present a systematic process for the stability and accuracy enhancement of the time domain PEEC model by improving the evaluation of the partial element based on the subdivision technique and by a filtering process.
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