Re: Distinct difference between schematic&EM simulation
Hi STD,
Loucy is right, the mesh is not set in a right way, so you don't have continuous metal and this is what you see on your graph. Normally 1/100 wavelength for the cell dimention is a good starting point, I think you can mesh with a cell size of 100um
But frankly speaking, the linear simulated filter doesn't look pretty good. The return loss in the passband is very poor --> your passband has quite big ripple.
With the linear simulation, you don't take in account the coupling between the arms of the filter. If you want more accurate linear simulation, use the coupled line model for the 6 arms. Take a look in the examples folder
\Circuit Design Types\Filters\18Ghz_LPF.emp and 8GHz_LPF.emp also for the XModel_BandPass.emp .
If you are using x models, be shore that you filled the database for the specific Er.
Please send PM to me if I can help further.
rgds, Al