The discontinuity problem of a metallic post coated by a dielectric tube in a rectangular waveguide has been solved numerically.-From the solution parametric curves have been derived displaying the parameters of the T-equivalent circuit in dependence of the post geometrie. Several cases of the dielectric tube permittivity are considered. For some special relations between the frequency, the dielectric constant and the radius of the post the reflection or the transmission coefficient becomes equal to zero. These relations give narrow-band filters. Experimental results have shown the utility of the method as a filter design tool.
|Number of pages||9|
|Journal||Archiv für Elektrotechnik|
|Publication status||Published - May 1987|