Beyond Rectification: Passive Backscattering Modulation

Wireless Sensor Networks are instrumental to many monitoring systems and control of dynamical systems, allowing real-time and pervasive information collection. However, they are hindered by their dependency on local energy sources, even though their physical transduction principle can be passive. This work proposes an early framework for converting any dc passive sensor into a wireless sensor with passive backscattering modulation capabilities. The operation consists of transforming dc resistance into an RF impedance through the mediation of the nonlinear device of a rectifier.