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A waveguide port boundary condition based on approximation space restriction for finite element analysis

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Author(s):
Orlandini, Francisco T. ; Devloo, Philippe R. B. ; Hernandez-Figueroa, Hugo E.
Total Authors: 3
Document type: Journal article
Source: ENGINEERING WITH COMPUTERS; v. N/A, p. 18-pg., 2025-01-05.
Abstract

A waveguide port boundary condition (WPBC) based on the restriction of the approximation space is presented in the context of Finite Element Analysis. As well as efficiently truncating the computational domain in the same manner as the traditional WPBC, the proposed scheme significantly reduces the degrees of freedom at the waveguide ports, simplifies the implementation and seamlessly provides post-processing results such as the reflected power in each waveguide mode. The boundary condition is thoroughly derived, and numerical examples are used as a support for the discussion on topics such as the needed number of modes to be employed at a waveguide port. Finally, a nanograting-based plasmonic sensor is analysed to illustrate further possibilities of the scheme. (AU)

FAPESP's process: 21/00199-8 - SMART NEtworks and ServiceS for 2030 (SMARTNESS)
Grantee:Christian Rodolfo Esteve Rothenberg
Support Opportunities: Research Grants - Research Centers in Engineering Program
FAPESP's process: 21/06506-0 - Strongly resonant all-dielectric metasurfaces based on quasi-dark and toroidal modes
Grantee:Hugo Enrique Hernández Figueroa
Support Opportunities: Regular Research Grants
FAPESP's process: 17/15736-3 - Engineering Research Centre in Reservoir and Production Management
Grantee:Denis José Schiozer
Support Opportunities: Research Grants - Research Centers in Engineering Program
FAPESP's process: 22/11596-0 - Scientific EMU: acquisition of transmission and characterization equipment for ultra-high-speed data links
Grantee:Darli Augusto de Arruda Mello
Support Opportunities: Research Infrastructure Program - Scientific
FAPESP's process: 21/11380-5 - CPTEn - São Paulo Center for the Study of Energy Transition
Grantee:Luiz Carlos Pereira da Silva
Support Opportunities: Research Grants - Science Centers for Development