弱電レクテナに適用したDC電源回路の開発

摘要

This study proposes a DC power-supply circuit for an mW low power RF-DC rectifier circuit. We know that the efficiency of a RF-DC rectifier circuit is affected by the load and the input power. So it can't supply a steady power for an available load user. In order to improve the efficiency characteristics, a RF-DC-DC power-supply circuit was proposed which consists of a RF-DC rectifier circuit and a DC-DC converter in this study. We simulated the proposed circuit with microwave frequency of 2.45GHz in rectenna and switching frequency of 1.8MHz in DC converter using Advanced Design System (ADS) simulator. The conversion efficiency was over 70% in a wide range of load 375Ohm to 1300Ohm at 100mW input power in comparison with a RF-DC rectifier circuit at the same conversion efficiency.