2.4GHZ RF-ID Tag System Information
Theory of Operation
is a technology for storing and receiving data through the transmission
of electromagnetic signals to an RF-compatible integrated circuit or Tag.
The whole system consists of two main parts:
The first; the Tag consists of one or several solid state memory chips which store data, a circuit board structure, and an antenna. In some cases it may also include a battery.
The second, a Reader or interrogater used to read and write data to the RF-ID tags. These readers may be portable or stationary and are controlled by a host computer. They transmit an RF signal to activate the tags and then interrogate each tag based on the information received from the inital transmission.
To be read or written to by the reader these tags must move through an RF field.
The reader may be stationary for a conveyor belt or production line system
or may be handheld for remote data collection or even vehicle mounted on
a forklift truck.
The tag memory is Field or Factory programmable and offers 1024 bits of storage, 96 are used for system addressing and control leaving 928 bits available to be programmed and locked in such a way as to fit any data collection application. These tags are passive and contain no battery but data can be written and rewritten up to 100,000 times into the tag..
Powerful anti-collision identification allows tags to be scanned at 50 tags per second regardless of how many are in the read zone. A high data transfer rate is also available with 8 bytes being able to be read in 12ms. Writing takes a little longer with one byte written every 25ms.