2.4/5.5 ghz pcmcia cards

Hi everybody! :

I'm trying to design an inverted-F printed dual-band antenna (2.4Ghz - 5.5 Ghz) for a PCMCIA card. My problem is that it's my first experience and I don't know which are the dimensions to start simulating. Any help will be useful. Thanks in advance

here is an example

Thank you vfone. I'm gonna try it :)