24 Rectangular waveguide filter

This example is available in .../QW-3D/Standard/Filters/Wgfilter/wgf.QWPro in the QW-Modeller examples directory and can be loaded using File®Open Examples... command from main menu.

General Description

Rectangular waveguide filter proposed by P.Ibbs and M.Guglielmi in the September 1996 issue of Microwave Engineering Europe. The structure is symmetric thus we enforce magnetic symmetry along symmetry axis and consider only a half of it.

Geometry

The filter is built in a 19.5 x 9.525 mm rectangular waveguide. The irises following consecutive waveguide sections are symmetric and span full height of the waveguide.

The input section is 19.05 mm long, the first and second resonator sections are respectively 11.18 and 12.784 mm long. The fourth and fifth resonator sections and output waveguide section are of the same length as second and first resonator sections and input waveguide section. The length and width of the following irises are: 11.05 mm and 2 mm, 8.01 mm and 1.96 mm, 8.01 mm and 2.86 mm, 8.01 mm and 1.96 mm, and 11.05 mm and 2 mm.

The magnetic symmetry plane is placed at Y= 0 and it coincides with the filter's symmetry plane.

Post Processing

S-parameters for the rectangular waveguide filter in View Results window.