Title :
RF-powered variable duty cycle wireless sensor
Author :
Costinett, Daniel ; Falkenstein, Erez ; Zane, Regan ; Popovic, Zoya
Author_Institution :
Dept. of Electr., Comput. & Energy Eng., Univ. of Colorado, Boulder, CO, USA
Abstract :
This paper discusses a low-power 2.4GHz ISM band wireless sensor based on commercial components for sensing and data transmission. The sensor is powered wirelessly in the 5.8-GHz ISM band through an integrated dual-polarization antenna, rectifier and power management module. Since the unit is intended for mobile use, the variable available power is monitored, and the duty cycle for wireless data transmission adaptively adjusted through use of a low-power microcontroller and a custom power management circuit. In sleep mode, the circuit consumes 1μA at 2.5V.
Keywords :
data communication; microcontrollers; multifrequency antennas; rectifiers; wireless sensor networks; ISM band wireless sensor; RF-powered variable duty cycle wireless sensor; commercial components; custom power management circuit; frequency 2.4 GHz; frequency 5.8 GHz; integrated dual-polarization antenna; low-power microcontroller; power management module; rectifier; sleep mode; wireless data transmission;
Conference_Titel :
Microwave Conference (EuMC), 2010 European
Conference_Location :
Paris
Print_ISBN :
978-1-4244-7232-1
