Radio with different modes of communications and power sources.

                Radio
frequency has been transformed from obscurity to mainstream application that
help to speed up the process of manufacture products and material. A few years
ago, people usually considered RFID from a supply chain perspective. But today,
RFID is being used in a variety of ways without realising it. RFID (Radio Frequency Identification)
is a system to read information and automate identification of an object or
person by using radio waves. RFID uses multiple radio frequencies and many
types of tags with different modes of communications and power sources.

            RFID
systems consists of 3 components; a transceiver (RFID Reader), a scanning
antenna and a transponder. Transponder is the RFID tag that consists of
microchip, antenna and case that has been programmed with information and the
scanning antenna outputs the radio frequency signal over a relatively short
period of time. It provides a means of communicating with the transponder and
provides the communication energy to the RFID tag in the case of passive tag. Passive RFID tags needed energy
transfer from the reader via radio frequency which do not insists of batteries
and communication range are very short. Active
RFID tags have its own power source and these tags can still get the signal
even if the reader stay farther. Sometimes called semi-passive or semi-active, battery-assisted passive (BAP) tags virtually
passive RFID tags that combine important active tags. To power on the chip, BAP
tags typically use an integrated power supply, usually a battery and the energy
captured from the reader then can be used for backscatter. When an RFID tag
enters a read zone of the scanning antenna, its data is captured by the reader
which microchips activated and sends out the information on the microchip to a
host computer or programmable controller for action.

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            Almost all libraries around the
world are using RFID tags to tag books. According
to managing director Lim Peck Hui of Tunity Technology, ‘When it comes to
tagging or tracking items, RFID works better than barcodes and QR codes as
multiple RFID tags can be read from a distance at an instant, so data is
captured quickly’. RFID systems can improve the ability if staff or
customer to find out the location of books. When compare barcodes system with
RFID systems, RFID systems can read multiple tags more than 100 simultaneously
but barcodes can only be read one at a time manually. In additional, barcodes
scanners needs to read the barcode directly whereas RFID tags does not need to
be placed in line with the scanner and can be scan or read farther than
barcode. The data in the barcode printed on the sticker and needs to be clearly
visible so that it can be scan easily. The exposure of the label can easily be
damaged due to weather or other reasons and forgery become easier whereas RFID doesn’t
suffer from any of this because it does not require sight and its electronic
nature means that data can be encrypted to prevent any leakage of information.

            Although RFID technology has been
effectively used which possess a lot of benefits that convince people, but
there are still exist some technical barriers need to be conquer to optimize
its application. First of all, compare with barcode system, RFID systems are
usually more expensive whether software or hardware. RFID needs to maintain
more expensive equipment throughout the life of the solution. Additionally, 

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