RFIDtagg

RFIDtagg refers to a radio-frequency identification tag, a small device used to identify and track objects remotely. In common usage, the term RFID tag describes a microchip with an antenna that stores data and responds to a reader. The spelling RFIDtagg is not standard, but is sometimes encountered as a variant in informal contexts.

A tag consists of an integrated circuit and an antenna. Passive tags have no power source of their own and harvest energy from the reader’s radio waves to power the IC and transmit data back. Semi-passive (or battery-assisted) tags have a battery to power the IC but still rely on the reader’s field to communicate. Active tags include their own power source and can initiate communication over longer distances. Data stored on tags is typically a unique identifier plus optional user data, such as batch numbers or asset information, stored in read/write memory.

RFID systems operate across several frequency bands. Low frequency (LF, around 125–134 kHz) offers short range with strong near-field coupling. High frequency (HF, 13.56 MHz) provides moderate range and is widely used in access control and smart cards. Ultra-high frequency (UHF, 860–960 MHz) supports longer read ranges and faster data rates, common in logistics and inventory. Microwave RFID (2.45 GHz, 5.8 GHz) enables very long-range applications.

Standards and interoperability are governed by organizations such as ISO/IEC and EPCglobal. Key standards include ISO/IEC 18000 family and EPC Gen 2 (ISO/IEC 18000-6C). Applications span supply chain, asset tracking, library systems, and access control. Privacy and security concerns—such as unauthorized reading and data integrity—drive measures like encryption, authentication, and access controls in many implementations.