The reflection coefficient of parallel-plate waveguide apertures is analyzed by wedge diffraction theory for the TEM and TE01modes. Results are compared with those obtained by other analyses for the special case of the normally truncated guide mounted in a ground plane and for that with thin walls. Measured values of reflection coefficient are used as verification of results for other guide geometries. The method gives accurate results for guide widths as narrow asλ/4.
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Rudduck et al. (1968) studied this question.
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