Abstract: Magnetic field induction energy harvesting is an effective solution for self-powered sensors in electromagnetic environment. Different from electric field and RF energy of single frequency, the electromagnetic field in power conversion systems contain wide frequency ranges. To increase the power density of self-powering module, it is important to harvest as much as power within limited volume. A dual-resonance bandpass filtering network is thus proposed. Furthermore, the output characteristics of the single LC resonant network and dual-resonance bandpass network are compared under different current patterns and load conditions. The suitable application conditions for dual-resonance bandpass network are summarized.