Source port definition of CST and HFSS simulation softwares

As my experiences for using CST and HFSS simulation softwares, if you want to set source port of antenna structures, you shall pay attention to following items.

1. shape of source port. In general, I draw a very-thin metal as source port.
2. height of source port. The hight should be critical, because it will be affected the accuracy of simulation reults. I always set the heigt is 0.1 times of total antenna height.