I'm trying to model the magnetic field of a Tesla bifilar type coil (pancake coil). I've searched the web for similar problems but only found ones that were solenoidal, closed ring, toroidal, or other. This will be used for AC currents but right now would be happy with just an equation for z-distance above the center using a DC source. I know Biot-Savart's law comes into play, but the only example similar to mine that I found was for a ring. I had thought about just doing that for the amount of turns I have, each with a different radius and adding them together, but I would think some of the B field would cancel out. Any help is appreciated. Thanks.