RF3p solves the driven frequency problem in three dimensions; as a result, only 3D models can be analyzed using RF3p. Those 3D models may contain both 3D and 2D solids.
The geometry must define a single contiguous domain that contains all of the simulated structures in the system. The simulation domain may be located anywhere in 3D space. There should be no isolated geometry, and solids that only touch at corners are not electrically connected.
Every RF3p simulation must contain at least one port, and it may contain as many ports as the system requires. The ports can be either lumped ports or wave ports, or a combination of the two, depending on the system that is being modeled.