Unable to get 1W of power by integrating Poyting vector on wave lumped port HFFS

[rdpdo2002]

Hello,

I am trying to calculate Power using field calculator on a wave lumped port at 1W :

I integrating poynting vector over the surface :
https://innovationspace.ansys.com/f.../2/2024/07/22-07-2024-1721657900-mceclip4.png

But I get 0.75 and not 1W...

Can someone give me some advice please ?

It work well on this coax example, using modal network analysus and wave port :

I got 1W :

Thanks you !

 

[rdpdo2002]

I have integrating on a plane wich extend to all domain and now I get 0.85W but still not 1W...

 

[PlanarMetamaterials]

The power on the ports may be the incident power and not the total power. Your coaxial example has the wave port covering all of the relevant modal fields, so likely there are no reflections. However your other microstrip examples have an exceptionally poor wave port setup (the port needs to encompass most modal fields, which extends to above the microstrip), likely resulting in a high return loss.

I don't know which power HFSS is referring to, but perhaps they state these in the user manual somewhere.

Good luck!