CSTferrite

Hi Im new in cst studio and want to simulate a ferrite loaded antenna but I cannot find the ferrite material. I dont know what material Ihave to choose from the offer in the window "load from material library".

Different ferrites might have very different properties in wide frequencies range. Do you have in mind any particular properties of the loading ferrite?
You miht be interested in probably similar application, solved by Method of Moments:
Automotive Smart Entry System - ferrite based coil antenna.

It should be a ferrite with relative permeability 17 and should work at 2,5 GHz