Need Help..! Yagi's HFSS design

[firmanwiz]

hello everybody

i am very dizzy right now..

i don't know how to perfect my yagi design in hfss

the program is running..but the parameter like directivity, gain didn't come out..and the radiation pattern and vswr is still wrong..

can anybody help me about the boundries, excitation, and radiation in hfss

urgent

[Diimu]

A couple of notions: The boundary around your antenna should be at least lambda/4 away from the antenna and you should use "radiation boundary", not Perfect electrical conductor (now your antenna is in middle of an perfectly conducting box...). Also remove both waveports and use lumped port to feed the radiating element (just draw a rectangle between halfs of the feeding dipole).