Title :
RF energy harvesting design using high Q resonators
Author :
Ungan, Tolgay ; Le Polozec, X. ; Walker, William ; Reindl, Leonhard
Author_Institution :
Dep. of Microsyst. Eng. (IMTEK), Univ. of Freiburg, Freiburg, Germany
Abstract :
This paper presents a new method for rectifying low ambient radiation sources to supply autonomous measurement systems such as microsystems. An impedance transformation with high quality factor (Q) in front of a Schottky-diode using a quartz resonator at 24 MHz is presented. In addition to an analytic computation and nonlinear simulation of the rectifier circuit with advanced design system (ADS) software, the circuit was built and the efficiency of the RF energy harvesting system was measured. The design has been optimized to achieve maximum sensitivity. The measurement results show a sensitivity of -30 dBm (1 muW) for DC output voltage of 1 V and an efficiency of more than 22 %.
Keywords :
Q-factor; Schottky diodes; circuit simulation; crystal resonators; energy harvesting; RF energy harvesting design; Schottky diode; advanced design system software; ambient radiation sources; autonomous measurement systems; frequency 24 MHz; high Q resonators; nonlinear rectifier circuit simulation; quality factor; quartz resonator; Analytical models; Circuit analysis computing; Circuit simulation; Computational modeling; Impedance; Q factor; Radio frequency; Rectifiers; Software design; Software systems; RF energy harvesting; RF-to-DC conversion; passive RFID; ultra-low-power rectifiers; wireless energy transmission;
Conference_Titel :
Wireless Sensing, Local Positioning, and RFID, 2009. IMWS 2009. IEEE MTT-S International Microwave Workshop on
Conference_Location :
Cavtat
Print_ISBN :
978-1-4244-5060-2
Electronic_ISBN :
978-1-4244-5062-6
DOI :
10.1109/IMWS2.2009.5307869
