If you installed CST MWS software in your machine, then
1. go to Help menu
2. select Help contents
3. Select Tutorials Overview
4. Click CST MICROWAVE STUDIO® Tutorial Overview
5. Click Antenna link
go through those tutorials, you will get idea, how to design patch antenna
dear kandee,l
thanks a lot for ur help i got the idea and design my desired antenna. but i wanna to know how to find the graph of frequency vs gain. if u please tell me this and i also design my antenna in HFSS and i want to see both results (S parameters) in same cartisian graph so is there any way... waiting four your reply... thanks 4 help once again