Wireless Micro Energy Harvesting Circuit for Sensor System

Abstract

This paper presents the design of the wireless micro energy harvesting circuit for sensor network systems without any batteries. The circuit is composed of a series resonant circuit and RF-to-DC converting circuit. For multiband operation, bandpass filter theory is utilized. The simulation and measurement results are presented in this paper. The measurement output voltage is over 2.2 V at 920 MHz while input power is −4 dBm as a power source.