Evaluation of simultaneous wireless power transfer and backscattering data communication through multisine signals

This paper evaluates simultaneous wireless power transfer and backscattering data communication through Multisine (MS) signals. For this purpose a MS-capable RFID reader is built from the ground up, and it is shown that: (1) the MS reader presents an improved reading range, (2) through proper MS design, MS receiver complexity is reduced to that of a regular CW receiver; (3) MS multi-frequency diversity has the potential to dispense the use of I/Q demodulators, mandatory in conventional receivers. Measurements show a reading range improvement with respect to a conventional CW reader: a MS signal required only half of the (average) power required by a CW signal to achieve the same range.