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What are RFID Tags and How They Work?

What is an RFID Tag?

Components of RFID Technology in FastTag

How RFID Technology Works in FASTag?

Benefits of RFID Technology in FASTag

Other Applications of RFID Technology

Comparing Active vs Passive RFID Tags

The classifications of RFID tags primarily consist of two types: active and passive, based on the power sources supplied and the functions performed. Here's a breakdown of the key types:

Point of Reference Active RFID Tags Passive RFID Tags
Definition Active RFID tags are equipped with a sealed power source, typically an internal battery, that powers the tag and enables long-distance communication. Passive RFID tags do not have an internal power source; instead, the tag's power is derived from the signal sent by the RFID reader.
Power Source Internal Battery. Signal From The RFID Reader; no internal battery.
Range Long-range communication, typically up to 100 meters. Short-range communication is usually up to 25 meters.
Cost Generally, it is more expensive due to the battery and longer range. Cost-efficient, simpler and does not require a battery.
Applications Vehicle tracking and logistics, high-value asset tracking, toll booths, and a myriad of other applications that require long-distance communication. Short-range identification encompasses retail inventory tracking, library management, and access control applications.
Lifetime Battery life may limit the device's lifetime to generally 3-5 years. Battery lifetime can be regarded as nearly infinite, with no degradation.
Size and Weight Larger and heavier due to the internal battery. They are compact and light because they are battery-free.
Working Principle Active RFID tags transmit their data by using the battery within the tag. Hence, they can send signals to a great distances. Passive RFID tags collect energy from the RFID reader's signal (radiofrequency signal) and send back information to the reader with the aid of it.
Examples of Application Appropriate for toll collection, fleet management, vehicle tracking and high-security areas. Suitable for item-level tagging for retail, library book movement, inventory management, and personal access control devices.

RFID Tags vs Barcode System

Both RFID tags and barcode systems serve the purpose of identifying and tracking data. However, the technology and its uses are different. Here's a table explaining their key differences:

Aspect RFID Tags Barcode System
Technology Uses radio frequency waves to transmit data. Requires line-of-sight scanning using lasers. 
Data Storage Requires line-of-sight scanning using lasers.  Only limited numeric or alphanumeric data can be stored. 
Durability Only limited numeric or alphanumeric data can be stored.  They are not easily damaged and can operate under harsh conditions. 
Scanning Range They can be scanned over a distance, even up to several meters.  Barcode scanning requires proximity to the scanner. 
Multiple Reads Capable of scanning multiple tags at the same time.  Only one barcode is scanned at a time.

Challenges of RFID-Based Toll Systems in India

FAQs about RFID Tags in FASTag