IDENTIFY AND TRACK OBJECTS.

RFID (RADIO FREQUENCY IDENTIFICATION) is widely used in various applications to identify and track objects . Technology advancements, in general, enabled technologies like RFID to become cheaper and to be adopted globally.
Though RFID technology has several advantages, only few specific applications are widely used in India:
Time and attendance application to replace traditional slot card time machine.
Electronic article surveillance for retail outlets.
Controlled access to vehicles in offices, police departments, parking areas, etc.
Smart card based solution to store data in the in-built memory chip.

Introduction:RFID stands for Radio Frequency Identification.
An RFID system requires a RFID reader and a RFID tag:
A reader, including an antenna -Device that is used to read and/or write data to RFID tags
A tagTransponder that carries data transmits to a reader. Tag with the data in it can identify an item in manufacture, goods in transit, location, vehicle, an animal or individual.
The communicationRFID uses a defined radio frequency to transmit and receive data from tags. The data travels through radio waves.

Frequency:The frequency bands are divided into three

Low Frequency (LF) – 100-500 KHzHigh Frequency (HF) – 13.56 MHzUltra

High Frequency (UHF) – 850 MHz – 5.8 GHz