omni directional antenna hfss

Hi everybody

I'm new to HFSS, I need your help in simulating a CPW fed multibande omnidirectional planar microstrip antenna.

It's for my final year project.

I find difficulties in :
Assigning excitations: Waveport vs. Lumped port?
Assigning boundaries...

Your help would be welcome.

ps: all the details concerning the antenna are in the attached pdf-file

the design is also attached, made on HFSS 11.

Thanks