or less of output power at the antenna (i.e., not including antenna
-- The reason why the industry has standardized around 1 Watt is
-- 1 Watt is the maximum UHF RFID output power as specified by the
FCC in North America as well as several other major countries
around the world.
-- Readers capable of 1 Watt are capable of reading RFID tagged
inventory and assets several meters away -- plenty of range for
the majority of tracking applications.
-- In the event that a 3 Watt reader is necessary, the presumption is
that there is a requirement to track items well in excess of the
5m - 10m that a mainstream 1 Watt reader is capable. Yet, the study
finds the vast majority of its EMI at 0.5m or less, distances for
which a 3 Watt reader would not realistically be used.
-- The study also ignores passive HF RFID, which is a substantial, if not
the dominant, type of RFID used in hospitals.
-- HF RFID operates at 13.56 MHz, typically operates at lower power
levels than UHF, and uses the magnetic portion of the radio wave to
communicate between reader and tag.
-- These characteristics make HF much less susceptible to EMI with
adjacent devices than UHF.
-- This is the same technology used for security badge access into
offices and buildings.
Quotes from Rob Balgley, CEO of SkyeTek
-- "We feel it is important to provide clarification around the results of
this study because RFID continues to drastically improve patient care
in the healthcare industry."
-- "While the results do a good job of indicating a limit to the amount of
RF power applied around medical devices, the test did not account for
|SOURCE SkyeTek, Inc.|
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