OpenEMS is arguably the only free and open source FDTD solver out there that is usable out of the box for RF (Radio Frequency electromagnetics) design. Its main competitive disadvantage is that FDTD requires simulated models to be meshed according to specific rules, yet it does not provide an automatic mesher to create such meshes. Some facilities already do exist but meshing by hand is time-consuming and error-prone – enough to stand in the way of broader adoption. OpenEMSH aims to be a mesher for OpenEMS that makes it as simple to use as any proprietary solution.
