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36 Coaxial directional coupler


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

General Description
An example of a simple coaxial directional coupler.

Geometry
The coupler contains a pair of coupled transmission lines in a metal housing. The main line is terminated with N-connectors (high power operation possible), while the coupled line uses a smaller SMA connector. To simplify the scenario, supporting dielectric elements and details of connectors are omitted. The geometry is not optimized.
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
S-parameters were calculated in the frequency band from 1 GHz to 10 GHz. Results are presented below 6 GHz only. Analysis of higher modes effects above 6 GHz is also possible.

S-parameters and isolation for the coaxial coupler.

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