Matching network improvement for RF energy harvesters in Body Sensor Area Network context

International audienceIn this paper, an impedance matching network is designed for an RF energy harvester used in the context of Body Sensor Area Networks. It is a fully passive circuit and allows compensating the antenna impedance variations linked with the presence of the body. The designed RF energy harvester has an average RF-to-DC conversion of 40 % for an incident power of -10 dBm for a variation of 30 to 120 Ω for the real part and of 0 to 150 Ω for the imaginary part of the antenna impedanc