Dual resonance microstrip patch antenna

hi...can anybody help me to design dual resonance.I tried lot of time to get dual resonance but fail.Can anybody check my design .plz help me.im using hfss for simulation

plz anybody help me...

Added after 1 minutes:

anybody plz give me any suggestion to improve my design...

how to Stacked shorted patch antenna with offset parasitic on hfss...plz help me..im new using hfss

I have the same problem...

try to design firstly a single layer.. then u can add a second one and check what happens.. u can compensate the effects by moving the probe..r u using a probe-fed structure...isn't it?

Regards,

Lupin