CST - S-parameters problem

Hello,

I tried to use this file:

https://www.3ds.com/products-services/simulia/resources/wire-dipole-antenna/

 

But when I start the simulation and that I display the S11 I got the attached S11.

What is wrong in the configuration ?

It's doing the same for all my simulations it stops at the center frequency.

Thank you for your help.

Guillaume

CST Studio Suite ​​​​​​​