Novel integral equation formulation for the analysis of capacitive step discontinuities
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Quesada Pereira, Fernando Daniel; Gómez Molina, Celia; Álvarez Melcón , Alejandro; Boria Esbert, Vicente Enrique; Guglielmi, MarcoÁrea de conocimiento
Teoría de la Señal y las ComunicacionesPatrocinadores
This research work has been financially supported by the Spanish Ministerio de Economía y Competitividad in the frame of the projects “Demostradores Tecnológicos de Filtros y Multiplexores con Respuestas Selectivas y Sintonizables en Nuevas Gu´ıas Compactas para Aplicaciones Espaciales (COMPASSES)” with Ref. TEC2016-75934-C4-1-R, and “Análisis y Diseño de Nuevos Componentes en Microondas y Milimétricas para Comunicaciones por Satélite (MILISAT)” with Ref. TEC2016-75934-C4-4-R. As an additional financial source we thank the Ph.D. scholarship granted by the Spanish national Ministerio de Educación, Cultura y Deporte with Ref. FPU15/02883.Fecha de publicación
2019-10-31Editorial
IEEECita bibliográfica
F. D. Quesada, C. Gómez, A. Álvarez Melcón, V. E. Boria and M. Guglielmi, "Novel Integral Equation Formulation for the Analysis of Capacitive Step Discontinuities," 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, GA, USA, 2019, pp. 1455-1456, doi: 10.1109/APUSNCURSINRSM.2019.8888675.Palabras clave
Integral EquationsMethod of Moments
Microwave filters
Resumen
In this contribution, a novel integral equation formulation is used for the electromagnetic analysis of rectangular waveguide capacitive discontinuities. The proposed integral equation, solved by the Method of Moments (MoM), accurately models the coupling between the step discontinuity and a given number of arbitrarily shaped metallic posts in its vicinity. The kernel of the Integral Equation is written in terms of parallel plate Green’s Functions in the spatial-spectral frequency domain taking into account the capacitive symmetry and thus reducing a 3D problem to a simpler 2.5D one. The computational technique has been validated through the analysis of a practical lowpass filter, that uses one capacitive step as an impedance inverter. The results are in very good agreement with respect of full-wave software tools while exhibiting higher computational efficiency.
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