An efficient integral equation technique for the analysis of arbitrarily shaped capacitive waveguide circuits
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AuthorQuesada Pereira, Fernando Daniel; Vera Castejón, Pedro; Álvarez Melcón , Alejandro; Gimeno Martínez, Benito; Boria Esbert, Vicente E.
Research GroupGrupo Electromagnetismo Aplicado a las Telecomunicaciones
Knowledge AreaTeoría de la Señal y las Comunicaciones
SponsorsMinisterio de Educación y Ciencia, Ref. TEC2010-21520-C04. Fundación Séneca, Ref. 08833/PI/08
PublisherAmerican Geophysical Union (AGU)
Bibliographic CitationQUESADA PEREIRA, F. D. et al. An efficient integral equation technique for the analysis of arbitrarily shaped capacitive waveguide circuits. Radio Science, 46, abril 2011. ISSN 0048-6604
Capacitive waveguide components
Lowpass waveguide filters
In this contribution a new and efficient integral equation formulation is presented for the analysis of arbitrarily shaped capacitive waveguide devices. The technique benefits from the symmetry of the structure in order to reduce the dimensions of the problem from three to two dimensions. For the first time, this technique formulates the waveguide capacitive discontinuity problem as a 2D scattering problem with oblique incidence, combined with an efficient calculation of the parallel plate Green's functions. The numerical method allows the efficient evaluation of the electromagnetic fields inside the analyzed structures. Results for different practical capacitive waveguide devices are successfully compared with commercial software tools for validation of the proposed theory. Finally, a novel lowpass filter implementation based on circular conducting posts has been proposed. The field contour lines in the critical gaps of the new structure are curved due to the use of rounded posts. This ...
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