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Sorry if this has been answered before, but I looked through the boards and parts of the manual and couldn't really find a definitive answer.
does anyone know the internal impedance of the proxmark3 on the antenna ports? also I'm curious as to whether anyone has checked out good working antennas designs in a network analyzer to determine what a good matching impedance is (discounting parasitics)? I'm interested in designing a better performance antenna for the 13.5Mhz tags than the coil of wire you massage to get to work.