3.4     Drawing the ports

In this step we need to draw and define the ports. In this case we need to define two ports, input and output. The input port will be placed at the waveguide and it will excite the fundamental TE10 mode and the output port with TEM mode will be placed at the coaxial line.

To define the ports we need to go to QuickWave tab. As a first one, we will define the waveguide input port. For that purpose we press Template Port  commands button.

Template Port commands button.

From the display we choose the plane at which the port shall be placed (green frame on the picture below):

Template Port edge selection – green frame.

Now, we proceed to port configuration in the Add Template Port:

Add Template Port dialogue.

We set the name of the port to SourcePort (default is Port_i). The Type Source of the port are properly set for this case, thus we may set the port’s dimensions. By default the port dimensions will be determined by Edge Loop selection (green frame on picture).

Confirmation of the Edge Loop selection and port creation with reference.

When the port is drawn we can set its parameters. We leave Reference Offset equal to 5, switch to the IO Parameters tab in the Add Template Port dialogue and excite the structure with a fundamental TE10 mode with a pulse of spectrum between 15 and 25 GHz. Pressing OK button accepts the settings.

Add Template Port dialogue for the input waveguide port.

In the next step we define the coaxial line output port by pressing Template Port  command button and selecting edge of the outer conductor cylinder (edge of the air filling cylinder). In this case the Reference Offset is set to 3.5.

Settings of the output TEM coaxial line port.

We select the face for port placement as previously, but this time we put the port on the coaxial line. We set the TEM mode in the frequency range from 15 to 25 GHz and accept the settings by pressing OK button.

Edit Template Port  dialogue with parameters for coaxial line output port.

Waveguide to coaxial line structure with ports.

Previous step: Drawing the structure.

Next step: Setting up the mesh.