Scatterer on substrate, RF module

Dear All,

Probably some of you RF module users saw module “Scatterer on substrate” in model gallery.

I have question about that, and I have question about total field formalism in generally.

So, basic idea is to start simulation with two calculations. First for calculating background field when we don't have scatterer on substrate, and second for calculating scattered field when we have scatterer on substrate and where we have background field from first calculation as incident field.

My first question, is there possible to solve these problems with two separate simulations???

So I want to start first simulation just for calculation of background field, and after that somehow to impose results from first simulation in second simulation where we want to find scattered field. So I don’t want to have two calculations in one simulation, but to separate them.


My second question (if is not possible to solve problem from my first question), is there possible to solve background field but without quality (or good) meshing of the scatterer. As you can see from that new module, in first calculation we have to define scaterrer like an air, but still there is a many mesh element, because we meshed that part of space on proper way for next simulation where we want to find scattered field. So, is there possible in first calculation of background field somehow to avoid good meshing of that part of space, and just to have good meshing in second calculation, where we really want to calculate scattered properties.


Maybe you already realize that my questions are related with saving time and memory, so I want to find out is there any possibility to solve these problems with much less mesh elements in first calculation, and with proper number of mesh elements in second calculation.


Thanks in advanced for every suggestion and answer.


Cheers.