Patch Antenna Design

I am designing a circularly polarized patch antenna with single feed from cxoaxial probe/by a via with feed coming from via from some other plane - multilayer PCB board. It will be helpful if some one can suggest me about the design equation/reference material for the design to go on with

thanks!

I attach PDF very useful.

Thanks for the reply but I dont want to design patch array. Design requires a single patch at 2.4 Ghz and it will be great if you can help me with design equations and matching considerations.

Thanks again for your reply

See this link
http://www.emtalk.com/mpacalc.php

brumi many thanks for your help :D

Thanks for the help now how can I increase the bandwidth and can someone provide the equations for U-Slot patch antenna design Thanks in advance - S