Title :
Experimental results with two wireless power transfer systems
Author :
Sample, Alanson ; Smith, Joshua R.
Author_Institution :
Intel Res. Seattle, Seattle, WA
Abstract :
This paper describes two wireless power transfer systems. The Wireless Identification and Sensing Platform (WISP) is a platform for sensing and computation that is powered and read by a commercial off-the-shelf UHF (915 MHz) RFID reader. WISPs are small sensor devices that consume on the order of 2 uW to 2 mW, and can be operated at distances of up to several meters from the reader. The second system harvests VHF or UHF energy from TV towers, with power available depending on range and broadcast transmit power. We report on an experiment in which 60 uW is harvested at a range of about 4 km.
Keywords :
UHF devices; radiofrequency identification; telecommunication power supplies; commercial off-the-shelf UHF RFID reader; frequency 915 MHz; power 2 muW to 2 mW; wireless identification and sensing platform; wireless power transfer systems; Battery charge measurement; Microcontrollers; Poles and towers; Power measurement; Radio frequency; Radiofrequency identification; TV; Temperature sensors; Voltage; Wireless sensor networks; RF Power Harvesting; Sensing; UHF RFID; Wireless Power Transfer;
Conference_Titel :
Radio and Wireless Symposium, 2009. RWS '09. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2698-0
Electronic_ISBN :
978-1-4244-2699-7
DOI :
10.1109/RWS.2009.4957273
