Numerical evaluation of the Green's functions for arbitrarily shaped cylindrical enclosures and their optimization by a new spatial images method
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Gómez Díaz, Juan Sebastián; Quesada Pereira, Fernando Daniel; Gómez Tornero, José Luis; Pascual García, Juan; Álvarez Melcón , AlejandroGrupo de investigación
Grupo Electromagnetismo Aplicado a las TelecomunicacionesÁrea de conocimiento
Teoría de la Señal y las ComunicacionesPatrocinadores
This work has been developed with support from the Spanish National Project (CICYT) with reference TEC2004-04313-C02-02/TCM, and the Regional Seneca Project with reference 02972/PI/05Fecha de publicación
2007-10Editorial
AGUCita bibliográfica
Gómez-Díaz, J. S., F. D. Quesada-Pereira, J. L. Gómez-Tornero, J. Pascual-García, and A. Álvarez-Melcón (2007), Numerical evaluation of the Green’s functions for arbitrarily shaped cylindrical enclosures and their optimization by a new spatial images method, Radio Science, 42, RS5007, doi:10.1029/2006RS003588Palabras clave
Electromagnetic AnalysisGreen's functions
Microstrip fliters
Resumen
IIn this paper, a spatial image technique is used to efficiently calculate the mixed potential Green’s functions associated with electric sources, when they are placed inside arbitrarily shaped cylindrical cavities. The technique is based on placing electric dipole images and charges outside the cavity region. Their strength and orientation are thencalculated by imposing the appropriate boundary conditions for the fields at discrete points on the metallic wall. A method for the assessment of the potentials accuracy is proposed, and several optimization techniques are presented. Three cavities are analyzed to demonstrate the usefulness of the techniques. The cutoff frequencies and potentials patterns are compared to those obtained by a standard finite elements technique, showing excellent agreement. Finally, a band-pass filter based on coupled lines is analyzed, demonstrating the practical value of the technique.
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