Reply To: HFSS – Electric Field on lumped port problem

[Jason.k]

Hello Jean, 

We appreciate reaching out to Ansys Forum. 

The different results you are experiencing when using Lumped ports in HFSS with Driven Terminal or Driven Modal solution types can be attributed to the nature of these solution methods. Driven Terminal and Driven Modal are two different solution types that are using different interpretations. In Modal, Port’s signal decomposed into incident and reflected waves while in Terminal Port’s signal interpreted as a total voltage (Vtotal = Vinc + Vref). 

To convert this total voltage to power we can use this formula: P=V^2/(2*Zo). 

I hope this helps. 

Kind regards, 
Jason.k