Is it possible to simulate planar coil printed on a PCB with FEMM? The only idea that come into my mind is to have 2n (if n is the number of turns) regions, each region represents a copper trace and has one turn (half traces have positive turn and half traces have negative turn). Something like this:
Is this correct approach? If yes should this be solved as a magnetic problem or as a current flow problem? Is what I draw something that is really a planar RFID coil in 3D? I can't seem to understand how those lines are closing.