A domain decomposition technique for finite element based parametric sweep and tolerance analyses of microwave passive devices

Guarnieri, Giacomo; Pelosi, Giuseppe; Rossi, Lorenzo; Selleri, Stefano

doi:10.1002/mmce.20346

Cited by 3 publications

(3 citation statements)

References 25 publications

(22 reference statements)

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“…This approach has been successfully applied to sensitivity analysis on dielectric permittivity manufacturing tolerances [17], [18], which is a very similar problem, being based on a large number of analyses of the same geometrical domain, with little differences on permittivity values in some small regions.…”

Section: Formulationmentioning

confidence: 98%

A Domain Decomposition Technique for Efficient Iterative Solution of Nonlinear Electromagnetic Problems

Guarnieri

Pelosi

Rossi

et al. 2010

IEEE Trans. Antennas Propagat.

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Fig. 8. Electric field distribution on the surface of the aircraft at different time locations. (a) Top view. (b) Bottom view.Fig. 9. Snapshots of the magnitude of the electric field distribution in the computational domain. The F-16 aircraft is illuminated by a Gaussian pulse on-nose incidence. VII. CONCLUSIONWe have presented an IP-DGTD with a conformal PML for the domain truncation. The numerical convergence of both central and upwind flux formulations were studied. Moreover, the late time instability and performance of the PML were studied by means of numerical experiments. Finally, a local time-stepping technique was employed to reduce the total CPU time and improve the efficiency in multi-scale applications. ACKNOWLEDGMENTThe authors thank Ansoft Corporation for their support of this work. REFERENCES[1] J. S. Hesthaven and T. Warburton, "Nodal high-order methods on unstructured grids," Abstract-An innovative method for fast analysis of electromagnetic problems comprising nonlinear dielectrics is proposed. The method is based on the combination of finite elements and domain decompositionmethods. This latter technique allows for the separation of the problem in multiple subproblems which can be solved separately. By appropriately defining one of such subdomains as containing all the nonlinear dielectrics it is possible to restrict the application of an iterative algorithm for the numerical solution of nonlinear equations only to this latter, smaller, domain. Numerical results showing the accuracy and efficiency of this technique are presented in few 2D cases.Index Terms-Domain decomposition, finite element method, nonlinear media, nonlinear wave propagation.

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Section: Formulationmentioning

confidence: 98%

A Domain Decomposition Technique for Efficient Iterative Solution of Nonlinear Electromagnetic Problems

Guarnieri

Pelosi

Rossi

et al. 2010

IEEE Trans. Antennas Propagat.

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“…and represent couplings between interior unknowns and boundary unknowns collected in . By using the Schur complement concept, the boundary unknowns of (10) and hence the generalized scattering matrix of the device can be retrieved with the same accuracy of the full domain solution [7]. Thus, in order to solve the HBDDFE system, every single submatrix is assembled at first sight, then, within the iteration loop, only the submatrices related to and are to be updated.…”

Section: Formulationmentioning

confidence: 99%

“…To enhance the computational efficiency, a substructuring DD approach is here proposed [4], [7]. The multiharmonic unknowns vector defined by the HBFE method over can be split into two vectors and containing the unknowns belonging to interior points in and , respectively.…”

Section: Formulationmentioning

confidence: 99%

Efficient Harmonic Balance Analysis of Waveguide Devices With Nonlinear Dielectrics

Ntibarikure

Pelosi

Selleri

2012

IEEE Microw. Wireless Compon. Lett.

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The computation of high order harmonic components of the time-harmonic field originated in waveguide structures containing nonlinear dielectrics is addressed exploiting harmonic balance and finite element methods. The solution of the nonlinear system is handled either via Picard or relaxed iterations. Being the nonlinear loop particularly time demanding, a domain decomposition method is proposed to speed-up the system solution by restricting the iteration to a small subdomain. A numerical example over a 2-D H-plane device is presented.Index Terms-Domain decomposition method, finite element methods, harmonic analysis, nonlinear media, waveguide filters.

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Neural-Network Modeling for 3-D Substructures Based on Spatial EM-Field Coupling in Finite-Element Method

Liao

Kabir

Cao

et al. 2011

IEEE Trans. Microwave Theory Techn.

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A domain decomposition technique for finite element based parametric sweep and tolerance analyses of microwave passive devices

Cited by 3 publications

References 25 publications

A Domain Decomposition Technique for Efficient Iterative Solution of Nonlinear Electromagnetic Problems

A Domain Decomposition Technique for Efficient Iterative Solution of Nonlinear Electromagnetic Problems

Efficient Harmonic Balance Analysis of Waveguide Devices With Nonlinear Dielectrics

Neural-Network Modeling for 3-D Substructures Based on Spatial EM-Field Coupling in Finite-Element Method

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