The C-band MPT rectifierusing a HEMT without bonding-wire connection for a space health monitoring system

This paper demonstrates fundamental evaluation results of a C-band rectifier using GaAs high-electron mobility transistor (HEMT) for microwave power transfer (MPT) inside of future reusable rockets. Rectifiers which utilize HEMT MMICs with hot-via interconnection structure are feasible solution to integrate with conventional wireless communication MMICs or sensor tags for low cost, light weight, and small components for space health monitoring system. Simulation of large signal S-parameters, measurement of rectification efficiency are conducted as a fundamental evaluation. Maximum rectification efficiency of 51.3 % at 5.1 GHz while the load resistance is 350 Ω is obtained from the measurement.