RFIDChips

RFIDChips are small integrated circuits embedded in or attached to tags that store data and communicate with RFID readers via radio frequency signals. They enable automatic identification and tracking of objects without direct line-of-sight.

A typical RFIDChips tag combines an integrated circuit with an antenna on a substrate. Tags may be passive, drawing power from the reader’s RF field; active tags carry their own power source; semi-passive tags have a battery for the chip but use the field to communicate.

RFIDChips operate across frequency bands such as low frequency (LF, around 125-134 kHz), high frequency (HF, 13.56 MHz), ultra-high frequency (UHF, 860-960 MHz), and microwave (2.4 GHz). Passive tags harvest energy from the reader; active tags periodically transmit signals.

Common applications include inventory and asset management, retail checkout, libraries, access control, and transportation passes; some passports and animal tag systems use RFID. The EPC Gen2 and ISO/IEC 14443/15693 standards guide interoperability in many systems.

Security and privacy concerns involve unauthorized data access, cloning, and unwanted tracking. Solutions include data encryption, mutual authentication, secure messaging, and operational controls such as shielding and selective tag disclosure.

Limitations include interference from metal or liquids, variable read ranges, and cost considerations for large deployments.