Study of complete WPT system for WSN applications at low power level

The simulation of a complete system of wireless power transportation (WPT) is presented and used to supply an energy module for wireless sensors. For the optimisation process, the different circuit blocks (antennas, medium, rectifier and DC-DC converter) and their constraints were listed. An innovative global approach was used to improve the radiofrequency/direct current (RF/DC) conversion and to test a low power operation in reception (about P_r = -10 dBm). A prototype was implemented and shows that interesting performance is obtained between the predicted output energy using the presented model and the measured one. This approach is a promising study for an RF energy scavenger as an alternative power source.