Radio-frequency identification (RFID) is a technology of encoding digital data in RFID tags. The principle of active RFID tag is to use a transmitter to broadcast the information stored within the tag via radio waves to the interrogator wirelessly with onboard power supply at all times, and the interrogator can interpret the data into useful information. It is intended for remote communicate over hundreds of feet, allowing for longest sensor range. They are best used for high value assets.
As a transmitter is embedded within a tag, the signal is very strong and allows for bouncing and reflecting off of surrounding materials. With this technology, reliable long reading distance is achieved even in difficult environments. The reading distance of active RFID tags can be up to 100 feet or more, and signals can be read without line of sight, allowing the technology to be used in a wider range of applications.
RFID tag come in a variety of shapes and sizes, operate through different frequency ranges for different purposes. The technology is often used to automatically identify objects by transmitting data from one device to another with little or no effort or manpower input. The technology has become more cost-effective and efficient over time, and is capable to be used for different industries.
THE ADVANTAGES :
．Low power detection
．Three Dimensions (3D) detect
．Two – way communication
．Long battery life