HFSS problem with simulating a symmetrical circular Horn

[saras]

HFSS problem

dear everyone,
I've been simulating a symmetrical circular Horn with a symmetrical hyperboloid small subreflector placed along the z-axe. my problem is that while seeing the radiation pattern, the pattern at phi=90 is not the same as in phi=0, whereas the structure is symmetrical.the simulation has gone several passes and the meshing seems ok.
may anyone help me? what's the problem?
thanks and
good luck
sara

 

[cricket0828]

HFSS problem

i have met similar problems too. Once i simulated a symmetrical antenna, but the current on its surface is unsymmetrical. nothing can explain it.

 

[itaifrenkel]

Re: HFSS problem

Have you tried using surface approzimation on the curved surfaces ?
Select curved objects . Right Click->Assign Mesh Operaiton -> Surface Approximation. Change the normal angle from 22.5deg to 5deg or so.

Itai