Software for simulating microstrip antennas

you can use from softwares:
1- ie3d
2-hfss
3-microware office
4- microwave CST
5- FEKO
these software usefull in simulate microstrip antenna.

hope it help.

https://www.edaboard.com/viewtopic.php?p=579931#579931

I think ADS line calculator is also a good tool and easy to use