An energy harvester to convert incident radio frequency, RF, energy associated with an RF signal to direct current energy as well as a corresponding method and sensor

A B S T R A C T An energy harvester to convert incident radio frequency, RF, energy associated with an RF signal to direct current energy, a rectifier comprising a pre- storage capacitor, wherein said rectifier is arranged to rectify said incoming incident RF energy thereby storing said RF energy into said pre-storage capacitor, an energy transfer unit comprising a storage output capacitor, wherein a capacitance value of said storage output capacitor is higher than a capacitance value of said pre-storage capacitor, and wherein said energy transfer unit is arranged to transfer said energy in said pre-storage capacitor into said storage output capacitor, a control unit arranged for controlling said energy transfer unit.