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RF Identification
and Proximity Readers
RF Identification (RF/ID) uses radio frequency
technology for tracking and identifying vehicles, animals,
pallets, etc. By affixing electronic tags to objects
and encoding specific information, an object can readily
be identified and tracked from a distance. RF/ID can
have proximity ranges of up to a 100 feet with minimal
interference. RF/ID provides both proximity and dynamic
identification so that tagged objects do not need to
be physically contacted or stationary in order to be
identified. RF/ID systems are extremely accurate, have
no line-of-sight requirements, and cannot be erased
easily from environmental conditions or strong magnetic
fields.
RF tags are either active or passive. Active tags
are usually more expensive because they can transmit
a low-powered signal. These tags come with batteries
and permit farther distances for RF identification.
Passive tags do not come with batteries and are detected
solely by the RF receiver.
The most common use of RF/ID is with toll tags.
Other applications include personnel monitoring, security
access, and package sorting.
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