How does HFSS derive the distribution of electromagnetic fields, such as Hz?

Using field calculator, calculator the Hz.

result,
3D Hz picture

,
how can I derive the distribution of electromagnetic fields, such as Hz, I want to put it in paper, like this
Thanks!

Welcome x529,

Your function is slightly off. You probably want something like Hz = AtPhase(ScalarZ(Smooth(<Hx,Hy,Hz>)),Phase), if you want a phase-dependant magnitude.

If you want complex magnitude, try Hz = CmplxMag(ScalarZ(Smooth(<Hx,Hy,Hz>))).

Good Luck!