design dual frequency microstrip patch antenna using awr

i've problem to get dual frequency at the same time.. my resonsnt frequncy is 0.9 GHz & 1.8 GHz.(GSM application)
anybody can help me..
this is my final year project..
tq

hi syuihaila..
im also doing final year for dual resonance...
u can get dual resonance by using slotted patch(U patch or E patch )

regards

alan

Hi

Maybee this article can give some inspiration.

http://www.mwrf.com/Articles/Index.cfm?ArticleID=17226

Regards