37 X-band magic T coupler

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

General Description

The structure is a model of X-band magic T (or magic tee or hybrid tee) waveguide coupler without matching elements (empty inside).

Geometry

The magic T consists of four rectangular waveguides (WR90 22.86 x 10.16 mm) meeting in a single junction. The ports are located inside the arms, behind the flanges. The mesh is limited to active areas only (flanges are not included) to make scenario as compact as possible.

The ports for S-parameters extraction are numbered as follows:

[1] - input port,

[2] - output (transmitted) port,

[3] - coupled port

[4] - isolated port

Post Processing

Full S-matrix was extracted with Smn postprocessing in the frequency band from 8 to 12 GHz.

S-parameters for excitation from arm H port [3]. Signal is divided equally and in phase between port [1] and port [2]. Port [4] is isolated.

S-parameters for excitation from arm E port [4]. Signal is divided equally but 180 deg out of phase between port [1] and port [2]. Port [3] is isolated.

Skk parameters for the unmatched magic T (empty junction without post and iris elements).