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RADIO SCIENCE,
VOL. 44,
RS5001,
12 PP., 2009
doi:10.1029/2008RS003985
Green's function of a parallel plate waveguide with multiple abrupt changes of interwall distances
Microwaves and Fiber Optics Laboratory, School of Electrical and Computer Engineering, National Technical University of Athens, Athens, Greece
Microwaves and Fiber Optics Laboratory, School of Electrical and Computer Engineering, National Technical University of Athens, Athens, Greece
The Green's function of a parallel plate waveguide with cascaded step discontinuities is computed by using analytical methods. The expression is written as a sum of two terms, the first of which corresponds to the effect of the horizontal plates on the primary source's field taking into account the symmetric images with respect to the metallic boundaries. The second term is related to the reflections from the vertical discontinuity edges, which are treated by applying successively a mode-matching technique. The solution of the posed boundary value problem is obtained through a well-conditioned linear system. The behavior of the guided waves far from the discontinuity region is determined with the help of far field approximations. Numerical computations for specific cases are presented and examined and many general purpose procedures of educational and tutorial interest are extensively described.
Received 1 August 2008; accepted 12 May 2009; published 2 September 2009.
Citation: (2009), Green's function of a parallel plate waveguide with multiple abrupt changes of interwall distances, Radio Sci., 44, RS5001, doi:10.1029/2008RS003985.
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