EM field summation from two different simulations?

I would like to sumthe E-field from two different simulations (same geometry but not necessarily same grid ). It is similar to simulation combiner in multiport simulations, but in this case i would like two combine the result from two different single port simulations. Is it possible ?

The Field_Combiner will allow you to sum two E fields, provided that they are at the same frequency.
However, I think this combiner requires that the two fields are on the same grid. This means you may first have to use the Interpolator algorithm first (Select both fields, choose the Interpolator in the ribbon, and it will interpolate the first field on the grid of the second).