finite substrate in momentum ADS

Hello

I 've a question about simulation with ADS momentum, does it take an infinite substrate for simulation? if yes, how can I define a finite substrate to simulate an antenna?

thanks

Yes, it uses infinite GND for simulation, not substrate.They are not same things.
In order to constraint this, you can use Momentum Box but I'm not sure that would work or not for antenna simulations..

Read and good luck :)