What is the recommended way to feed a dipole antenna with a physical gap in Altair Feko when the d

Question

In my model, the dipole is made of cylindrical PEC/metal parts separated by a small gap. I would like to excite the antenna across this gap and obtain reliable input impedance, current distribution, and radiated power results.

Should I use a discrete/edge port directly between the two cylindrical faces, a small feeding cylinder/bridge with a voltage source, or another type of port/excitation? Also, are there any best practices regarding the mesh around the gap and the interpretation of surface current density when using cylindrical solid/surface geometry instead of wire elements?

Vanderson · Answer

Dear Jaehoon,

Thank you very much for your message and for sending the Feko model. It is very helpful.

I would like to ask whether you would have a similar model with a physical gap between the two arms of the dipole.

Best regards,

Vanderson

Jaehoon · Answer

Dear @Vanderson,

Please have attached Feko model showing how to set up a thick cylindric dipole antenna.

(The model was made with the Feko 2026 version.)

Cylindric_dipole.cfx

Dipole antenna: constructed with a cylinder.

Port: Edge port

Source: Voltage source

Request:  Far-field and Current

If you run the model, you will have the following results.

Best regards,

Jaehoon