log periodic antenna feeding part

Hi all, i design an log periodic antenna in CST and perform simulation. i used the discrete port to simulate these antenna structure.it have good S11 response. But i need to connect the antenna with an SMA connector to have proper or more realistic simulation result.
i need to do a simulation of antenna connect with the sma connector. But how should i connect the sma connector?
If i connect SMA connector with the log periodic antenna, am i need to use the waveguide port to simulate the result ?

Thank you and best regards.