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Highly efficient full‐wave electromagnetic analysis of 3‐D arbitrarily shaped waveguide microwave devices using an integral equation technique
Author(s) -
Vidal A.,
SanBlas A. A.,
QuesadaPereira F. D.,
PérezSoler J.,
Gil J.,
Vicente C.,
Gimeno B.,
Boria V. E.
Publication year - 2015
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1002/2015rs005685
Subject(s) - basis function , waveguide , coaxial , method of moments (probability theory) , computation , integral equation , electromagnetic field , microwave , solenoidal vector field , basis (linear algebra) , electromagnetic radiation , boundary value problem , computer science , mathematical analysis , physics , electronic engineering , optics , mathematics , algorithm , engineering , telecommunications , geometry , statistics , quantum mechanics , estimator , vector field
A novel technique for the full‐wave analysis of 3‐D complex waveguide devices is presented. This new formulation, based on the Boundary Integral‐Resonant Mode Expansion (BI‐RME) method, allows the rigorous full‐wave electromagnetic characterization of 3‐D arbitrarily shaped metallic structures making use of extremely low CPU resources (both time and memory). The unknown electric current density on the surface of the metallic elements is represented by means of Rao‐Wilton‐Glisson basis functions, and an algebraic procedure based on a singular value decomposition is applied to transform such functions into the classical solenoidal and nonsolenoidal basis functions needed by the original BI‐RME technique. The developed tool also provides an accurate computation of the electromagnetic fields at an arbitrary observation point of the considered device, so it can be used for predicting high‐power breakdown phenomena. In order to validate the accuracy and efficiency of this novel approach, several new designs of band‐pass waveguides filters are presented. The obtained results (S‐parameters and electromagnetic fields) are successfully compared both to experimental data and to numerical simulations provided by a commercial software based on the finite element technique. The results obtained show that the new technique is specially suitable for the efficient full‐wave analysis of complex waveguide devices considering an integrated coaxial excitation, where the coaxial probes may be in contact with the metallic insets of the component.