Duffing resonator circuits for performance enhancement of wireless power harvesters

This paper presents the application of Duffing nonlinear resonator circuits in wireless power harvesters. Such resonators allow the wireless harvesters to maintain high voltage amplitude over a wide bandwidth. Therefore, they can effectively reduce the frequency sensitivity of the harvesters, and can be used to capture energy within a wide frequency spectrum. The theoretical analysis, as well as the properties of the circuit, are investigated and verified by experimental results.