Summary
International Symposium on Antennas and Propagation
2006
Session Number:1A1
Session:
Number:1A1-1
Dielectric Rough Wall Parallel Plate Waveguide
Hsueh-Yuan Pao,
pp.1-4
Publication Date:2006/11/2
Online ISSN:2188-5079
Summary:
This paper derives the modal fields propagating in a dielectric parallel plate waveguide with rough walls. An equivalent surface-impedance boundary condition is applied at two uniform planes near the rough walls. These two planes form the parallel plate waveguide. The roughness of the interfaces is accommodated by making the equivalent surface impedance a random function of position on the wall. The roughness is only considered along the propagation direction. The scalar potential functions from which the field components are derived satisfy an infinite set of stochastic integral equations, approximate solutions to which are obtained by iteration. It is found that (1) the "TE" and "TM" modes possess the similar propagation characteristics as propagating in the free space; (2) the power density carried by the incoherent part of the field depends on the operating frequency, the positions in the waveguide cross section, and roughness. Representative numerical results are presented to illustrate the analysis.