Equivalent circuit from Microstrip patch Antenna

Can you help me how way i can get equivalent circuit from design?

Which software is it possible ? CST or ADS ?

I'm not acquainted with CST, but in HFSS you cannot do that (as far as I know). You need to fit the equivalent circuits from the Microstrip Antennas chapter in Balanis book (probably two RLC tanks regarding the two radiating edges) and then tune it using for example ADS, until it fits the resonances obtained in CST or HFSS.