A tunneling magnetoresistive device comprises an insulating barrier layer, and at least two ferromagnetic layers provided on the same plane of the layer. Preferably, the drying fixture includes grooves or raised edges that define the outer contours of each desired tissue graft, after they are cut, and further includes raised or indented logos that emboss the middle area of the tissue grafts during dehydration and that enables an end user to distinguish the top from the bottom side of the graft. In the receiver portion of the transceiver, the front end of the RFID reader uses a pair of down-conversion mixers to demodulate a received signal into in-phase and quadrature components and analog-to-digital converters digitize the signal.