Could you please explain how to add a port at the interface where two cylindrical surfaces overlap when creating a dipole antenna?

NoYa

 

Parameter	Value (m)
a	0.0１
l1	0.5

　I am trying to create a dipole antenna model where I need to place a port at the interface where two cylindrical surfaces overlap. I aim to calculate the S-parameters in both underwater and air environments, as shown in the attached figure.

When I attempt to create the dipole using a line, I encounter an error stating that the connection point cannot be found, so I opted to construct the dipole using cylinders instead. However, I am unsure how to correctly place a port at the interface of these two cylinders. Could someone please guide me on how to set up the port in this configuration?

Torben Voigt

Hi NoYa,

I would recommend removing this face for both cylinders (the face that is shared by both):

The union them both and add the edge port:

That's it. The model is attached.

I also attached a wire dipole model.

Best regards,
Torben

Torben Voigt

Hi NoYa,

I would recommend removing this face for both cylinders (the face that is shared by both):

The union them both and add the edge port:

That's it. The model is attached.

I also attached a wire dipole model.

Best regards,
Torben

NoYa

Hi Torben,

Thank you so much for your detailed response and the attached models. Removing the shared face and adding an edge port as you suggested makes perfect sense. I appreciate your clear instructions and the time you took to provide this solution. It has been very helpful, and I feel confident moving forward with my project now.

Best regards,
NoYa

Torben Voigt

Hi NoYa,

Always happy to help!
Note, the wire dipole will of course require significantly less memory and runtime than the cylinder dipole. You might want to work with the wire dipole first.

Best regards,
Torben