The accuracy and range of radio frequency identification (RFID) systems,
which are used in everything from passports to luggage tracking, could be vastly
improved thanks to a new system developed by researchers at the University of
Cambridge.
The vastly increased range and accuracy of the system opens up a wide range
of potential monitoring applications, including support for the sick and
elderly, real-time environmental monitoring in areas prone to natural disasters,
or paying for goods without the need for conventional checkouts.
The new system improves the accuracy of passive (battery-less) RFID tag
detection from roughly 50 per cent to near 100 per cent, and increases the
reliable detection range from two to three metres to approximately 20 metres.
The results are outlined in the journal IEEE Transactions on Antennas and
Propagation.
RFID is a widely-used wireless sensing technology which uses radio waves to
identify an object in the form of a serial number. The technology is used for
applications such as baggage handling in airports, access badges, inventory
control and document tracking.
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