Help: How to simulate UWB antenna with Zeland IE3D?

[verashen]

zeland antenna

I simulate an UWB patch antenna covering 3~11GHz, with the finite ground, the antenna size is 200mm, and the thickness is quite large(about 15mm), can the differential port work?
For both frequency range and antenna dimension are too large,the simulation of every point takes very long time, so I decrease the mesh number to 6, and the result is not proper, so is there any good suggestion to reduce the time with acceptable accuracy?

 

[esamforum]

Did u try to separat it into rectangles (rectangliz) this reduce the no of meshes much, And u can also use a wall if the structure got some kind of symmetry