High breakdown voltage GaAs schottky diode for a high efficiency rectifier in microwave power transmission systems

Abstract

Microwave wireless power transmission systems require a high RF-DC conversion efficiency rectifier at input power such as 1 W. To meet this requirement, a rectifying device with high breakdown voltage is developed. This paper describes a fabricated high breakdown voltage GaAs Schottky Barrier Diode (SBD) as the rectifying device. The fabricated GaAs SBD at low doping concentration of 2.6×1016 cm-3 achieves breakdown voltage of 23.5 V and the conversion efficiency of 77.2% at input power of 27 dBm under condition without harmonic tuning technique which is agreed with simulation result. When harmonic tuning technique is adopted, a 5.8 GHz-band singleshunt rectifier with the fabricated GaAs SBD achieves the conversion efficiency of 81.7% at input power of 27 dBm in simulation. This conversion efficiency is the best performance at around 1 W input power and C-band to our knowledge.