An Energy-efficient Wireless Information and Power Transfer System with Multiple Antennas in Wireless Sensor Networks

In this paper, we present an architecture for a wireless sensor that incorporates energy harvesting and efficient wireless information transmission. An energy source delivers wireless power and transmits information to a sensor node over erasure channels using multiple antennas. The sensor node also receives and harvests the electromagnetic (EM) signals radiated by the energy source. Using spatial and polarization diverse antenna architectures, energy efficient designs and strategies are proposed. Numerical results show that the multiple antenna architectures offer improved energy efficiencies relative to traditional single antenna links in both Rayleigh and Rician channels exhibiting either partial or high spatial correlations.