Help me to solve an error in CST simulation.

When I run my antenna simulation in CST 2006, I occasionally get the error message "The waveguide port is too short, it must be homogeneous at least 3 mesh planes along the wave propagation". I ve tried to make the waveguide port larger, but still get this error. Anyone know about this?
Thanks.

Hi,
try find this topic in the forum -it is typical problem. 1) you must increase mesh cells or better 2) little change your structure, your strucure must be homogenous before (3 mesh cells) waveguide port.

Hi,
I usually use CST for my simulations. I suppose that you should select "Mesh/Global mesh properties" menu and set up your meshing size. I think number of lines per wavelength is low and length of your port does not include necessary number of mesh cells.
Try it!
Good luck

increase the mesh step for X and Y.