Microwave Rectifiers With Wide Output Load Range Based on Multiple Single-Stage Voltage Multipliers in Parallel

A multiple single-stage voltage multipliers in parallel is analyzed and proved theoretically to exhibit slowly changing input impedance with the wide load range in this letter. Based on this unique property, a low-power microwave rectifier consisting of two (which is the optimal number) single-stage voltage multipliers in parallel is designed, fabricated, and measured for different output load, which showed a good characteristics in both efficiency and load range, and kept power conversion efficiency (PCE) higher than 60% from 3 to 20 k Omega, in good agreement with simulation results.

Automated summary

This letter analyzes and theoretically proves that multiple single-stage voltage multipliers in parallel exhibit slowly changing input impedance with a wide load range. Based on this unique property, a low-power microwave rectifier consisting of two single-stage voltage multipliers in parallel is designed, fabricated, and measured for different output loads. The results show good characteristics in both efficiency and load range, with power conversion efficiency (PCE) maintained above 60% from 3 to 20 kΩ, which is in agreement with the simulation results.