VARIATIONAL FINITE-ELEMENT SOLUTION FOR DISSIPATIVE WAVEGUIDES AND TRANSPORTATION APPLICATION
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.
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Corporate Authors:
Institute of Electrical and Electronics Engineers (IEEE)
3 Park Avenue, 17th Floor
New York, NY United States 10016-5997 -
Authors:
- McAulay, A D
- Publication Date: 1977-5
Media Info
- Features: References;
- Pagination: p. 382-392
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Serial:
- IEEE Transactions on Microwave Theory Technology
- Volume: MTT
- Issue Number: 5
- Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Subject/Index Terms
- TRT Terms: Analysis; Automatic train protection; Computer programs; Electromagnetic waves; Electromagnetism; Prevention; Proximity detectors; Rapid transit; Safety; Warning systems; Waveguides
- Old TRIS Terms: Electromagnetic waveguides; Propagation in guides
- Subject Areas: Operations and Traffic Management; Public Transportation; Railroads; Safety and Human Factors; Security and Emergencies;
Filing Info
- Accession Number: 00167565
- Record Type: Publication
- Source Agency: Engineering Index
- Files: TRIS
- Created Date: Jan 13 1981 12:00AM