An MOR Algorithm Based on the Immittance Zero and Pole Eigenvectors for Fast FEM Simulations of Two-Port Microwave Structures

Grzegorz Fotyga; Damian Szypulski; Adam Lamęcki; Piotr Sypek; Michał Rewieński; Valentin de la Rubia; Michał Mrozowski

doi:10.1109/tmtt.2022.3166657

An MOR Algorithm Based on the Immittance Zero and Pole Eigenvectors for Fast FEM Simulations of Two-Port Microwave Structures

Abstract

The aim of this article is to present a novel model-order reduction (MOR) algorithm for fast finite-element frequency-domain simulations of microwave two-port structures. The projection basis used to construct the reduced-order model (ROM) comprises two sets: singular vectors and regular vectors. The first set is composed of the eigenvectors associated with the poles of the finite-element method (FEM) state-space system, while the second one is made up from the eigenvectors corresponding to the zeros of the diagonal elements of the matrix-valued immittance transfer function. Importantly, just one LU factorization of the FEM system is required to construct the projection basis during the reduction process, due to the application of a new formulation based on the Schur complement. The sets of eigenvectors that are used in the basis are independent of one another, which makes the new technique better suited for parallel computing compared with previously developed methods, which are sequential in nature. The reliability and accuracy of the proposed scheme are compared with that of the standard MOR technique, namely, the reduced-basis method (RBM), and verified through the analysis of three microwave structures: an eighth-order dual-mode waveguide filter, a dielectric resonator filter, and a folded waveguide filter.

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Authors (7)

Grzegorz Fotyga dr hab. inż.
Damian Szypulski
Adam Lamęcki dr hab. inż.
Piotr Sypek dr inż.
Michał Rewieński dr inż.
Valentin de la Rubia Phd
- Universidad Politécnica de Madrid, e Departamento de Matemática Aplicada a las Tecnologías de la Información y las Comunicaciones (TIC), Escuela Técnica Superior de Ingenieros de Telecomunicación (ETSI)
Michał Mrozowski prof. dr hab. inż.

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DOI:: Digital Object Identifier (open in new tab) 10.1109/TMTT.2022.3166657
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Keywords

COMPUTER-AIDED ENGINEERING, DESIGN AUTOMATION, FINITE-ELEMENT METHOD (FEM), MICROWAVE CIRCUITS, MODELORDER REDUCTION (MOR), REDUCED-BASIS METHODS (RBMS).

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Category:

Articles

Type:

artykuły w czasopismach

Published in:

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES no. 70, pages 2979 - 2988,
ISSN: 0018-9480

Language:

English

Publication year:

2022

Bibliographic description:

Fotyga G., Szypulski D., Lamęcki A., Sypek P., Rewieński M., de la Rubia V., Mrozowski M.: An MOR Algorithm Based on the Immittance Zero and Pole Eigenvectors for Fast FEM Simulations of Two-Port Microwave Structures// IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES -Vol. 70,iss. 6 (2022), s.2979-2988

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