A Novel Port/Network Parameter Extraction Technique for Coupling Circuits With Full-Wave Time-Domain Integral Equation Solvers

O'Connor, Scott; Hughey, S.; Dault, D.; Pray, A. J.; Villa-Giron, J.; Shanker, B.

doi:10.1109/tmtt.2018.2880961

Cited by 5 publications

(2 citation statements)

References 30 publications

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“…As a result, resolving nonlinearities in the circuit system requires iterating the entire system through a Newton-like solver until the constraints are satisfied to a desired tolerance. This is different to coupled solvers in frequency domain, where the EM system can be condensed into a set of equivalent port parameters extracted using a Schur complement approach 7,8 . In addition to being more computationally efficient, this approach is circuit agnostic, since the extracted parameters can be used with any attached circuit subsystem.…”

Section: Introductionmentioning

confidence: 99%

“…Doing the same in time domain is challenging because of known instabilities in deconvolution 9 . A recently proposed technique 8 for solving coupled circuits with time domain integral equation solvers overcame this fundamental bottleneck. The key contribution of this paper is the development of a method for extracting transient port parameters in the EM-circuit interface for finite element systems.…”

Section: Introductionmentioning

confidence: 99%

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Port Parameter Extraction Based Self Consistent Coupled EM-Circuit FEM Solvers

Ramachandran,

O'Connor,

Crawford

et al. 2021

Preprint

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Self consistent solution to electromagnetic (EM)-circuit systems is of significant interest for a number of applications. This has resulted in exhaustive research on means to couple them. In time domain, this typically involves a tight integration with field and non-linear circuit solvers. This is in stark contrast to coupled analysis of linear/weakly non-linear circuits and EM systems in frequency domain. Here, one typically extracts equivalent port parameters that are then fed into the circuit solver. Such an approach has several advantages; (a) the number of ports is typically smaller than the number of degrees of freedom, resulting in cost savings; (b) is circuit agnostic. A port representation is tantamount to an impulse response of the linear EM system. In time domain, the deconvolution required to effect this is unstable.Recently, a novel approach was developed for time domain integral equations to overcome this bottleneck. We extend this approach to time domain finite element method, and demonstrate its utility via a number of examples; significantly, we demonstrate that the coupled and port parameter solutions are identical to desired precision for non-linear circuit systems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%