How antenna bandwidth designed in cst used in MATLAB OFDM code?

Dear Researcher,
I have designed a dual-band antenna having bandwidth 270 MHz and 400 MHz. Now, I want to use this simulated bandwidth in my MATLAB code for OFDM. How can I import this -10 dB impedance bandwidth (270 and 400 MHz) directly to my MATLAB code?
Is it possible to use the antenna simulation bandwidth using directly to MATLAB i.e CST-MATLAB interfacing for bandwith import form CST to MATLAB code for OFDM? A quick response is highly appreciated.

You can export the S11 plot data of your antenna from CST in ASCII file format (txt file). Then, open that file in MATLAB, read the data inside it to a matrix and use it in your MATLAB code.
To export the S11 plot data from CST: view the S11 plot, go to the "post processing" tab, and choose export ASCII file.