Subnanosecond Pulse Generators for Impulsive Wireless Power Transmission and Reception

This brief describes a novel impulsive wireless power transmission (WPT) and reception system. This new concept enhances the power conversion efficiency (PCE) for low average input power. Low input power is important in several applications, such as biomedical implant devices and energy harvesting from unknown sources. An ultrawideband (UWB) monocycle pulse generator is designed using a shunt step recovery diode. The fabricated pulse generator produces an impulse width of approximately 290 ps. Complete wideband transmitting and receiving systems are implemented to validate the feasibility of impulsive WPT technologies and to assess the improvement of the conversion efficiency of the rectifier circuitry. Finally, UWB impulsive wireless transmission systems demonstrate 59.6% PCE, even when the input power of the rectifier is less than - 2.84 dBm.