ChowChen said:I simulate a horn antenna by HFSS.But i find the gain G is smaller than the directivity D. Usually ,G=ε × D , ε is efficiency ,0<ε≤1.
Possible reasons:ChowChen said:Sorry, there is a wrong in my question.
The result of hfss is that the gain is larger than the directivity.
The result of Hfss is wrong?
thank you for u
the material of model is pec,so it is not the first case.
how to solve the problem of 2.
ifelix said:Asdfaaa said:
1. in ur simulation model, metal loss is considered
I don't understand what it means...
If I consider metal loss I have efficiency=Rrad/(Rrad+Rloss) <1. And no problem exists...
In the case of pec efficiency = 100% and so I would have G=D...
Isn't it right?