Wireless Power Transfer And Data Communication For Biomedical Application

A technique of wireless power transfer(WPT) system for biomedical applications with backscattering communication, a rectifier use with active bias mechanism(dependent and independent stages) overcome the diode device losses has been presented in this paper. A part from conventional and static Vth cancellation technique rectifiers, it achieve s more than double efficiency and achieves powerless reduction in both forward and reverse biased condition s it decrease turn on voltage in forward bias condition along with decrease in reverse leakage current during reverse bias condition. Under the input conditions (Vin=1Vp-p coupling coefficient's=0.01 at 200MHz frequency with transmitter and receiver inductance of 22nH), actively biased differential drive rectifier sable to achieve DC voltage of 880mv for 50k Omega load resistance independent stage and achieves DC voltages of 803.2mv for 50k Omega load resistance in independent stage. Backscattering communication has been performed using switch by changing the resonance frequency of the receiver.