A high efficiency 2.45 GHz microwave rectifier based on diode array

A microwave rectifier is an essential part of a microwave power transmission system. In order to maintain high rectifying efficiency at a high input microwave power level, a novel microstrip microwave rectifier based on diode array is presented in this paper. The microwave input power was enhanced to 33 dBm at 2.45 GHz. The simulated and measured results show the proposed microwave rectifier presents a reasonable efficiency at given input microwave power, while the load varies within a certain range. The rectifying efficiency is higher than 60% when the input microwave power is between 27 dBm to 31.7 dBm. The maximum efficiency of 63.3% is achieved at 30 dBm input microwave power.