Summary: Experimental Results with two Wireless Power Transfer Systems
Alanson Sample1,2
and Joshua R. Smith1
1
Intel Research Seattle, 1100 NE 45th
Street, Seattle, WA 98105 2
Department of Electrical
Engineering, PO Box 352500, University of Washington, Seattle, WA 98195
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
(915MHz) RFID reader. WISPs are small sensor devices that
consume on the order of 2uW to 2mW, 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 60uW is harvested at a range of about 4km.
Index Terms -- Wireless Power Transfer, UHF RFID, RF

Source: Anderson, Richard - Department of Computer Science and Engineering, University of Washington at Seattle

Collections: Computer Technologies and Information Sciences