A procedure is developed for determining the complex propagation constants and associated complex electromagnetic fields as a function of frequency for electromagnetic waves propagating along an inhomogeneous waveguide composed of dissipative materials and having a complicated shape. The wave equation, which is complex because of the presence of dissipative materials, is transformed for computer solution into a matrix eigenvalue equation by the application of the Rayleigh-Ritz variational method in conjunction with the finite-element method. The results are reviewed for several simple dissipative waveguides for which analytical results are computed for comparison. A novel proposal is then investigated in which a railroad track acts as a surface waveguide for a rapid-transit collision-avoidance system. The results illustrate the usefulness of the numerical method developed and suggest that the modified steering rail warrants further investigation for rapid-transit systems.
Variational finite-element solution for dissipative waveguides and transportation application
Loesung der Variationsrechnung nach der Methode der endlichen Elemente fuer die Anwendung in verlustbehafteten Hohlleitern und bei Transportwegen
IEEE Transactions on Microwave Theory and Techniques ; 25 , 5 ; 382-392
1977
11 Seiten, 10 Bilder, 1 Tabelle, 28 Quellen
Article (Journal)
English
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