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Knowledge
Mar 10, 2026Explaining Backscatter in RFID: How Passive Tags “Talk Back” Without a Transmitter
What is backscatter (in RFID)? Backscatter is the communication method used by most passive UHF RFID tags to send data back to a reader without generating their own RF carrier. Instead of transmitting like a radio, the tag changes its electrical load/impedance, which changes how much of the reader’s RF signal is reflected back. ISO’s UHF air-interface standard explicitly describes this as a passive-backscatter RFID […]
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Knowledge
Mar 10, 2026
Load Modulation: The “Tag-to-Reader” Uplink in HF RFID & NFC
What is load modulation? Load modulation is the method most HF RFID (13.56 MHz) and NFC tags use to send data back to a reader in the near field. Instead of actively transmitting RF power, the tag switches an electrical load (often a resistor or transistor network) across its antenna coil. That change in tag current is coupled back through mutual inductance and becomes a […]
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Uncategorized
Feb 28, 2026
RFID Read and Write: How RFID Data Is Read, Written, Locked, and Verified in Real Deployments
In RFID systems, read means the reader detects a tag and retrieves data from its memory. Write means the reader changes data stored on the tag (for example, writing a new EPC or user data), sometimes followed by locking that data to prevent future changes. Most commercial RFID deployments use UHF (RAIN RFID) for longer range and fast bulk scanning. The core air-interface […]
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Knowledge
Feb 26, 2026
LLRP / ALE / EPCIS: The RFID Software Standards That Turn Raw Reads Into Business Events
What are LLRP, ALE, and EPCIS (in one minute)? These three GS1/EPCglobal standards cover different layers of an RFID solution: A helpful mental model is: LLRP = control readers → ALE = filter/shape reads → EPCIS = share business events Where they fit in an RFID architecture GS1’s architecture discussions describe that when ALE and LLRP […]
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Knowledge
Feb 26, 2026
RFID Software: What It Is, How It Works, Architecture, Standards (LLRP/EPCIS/ALE), and How to Choose the Right Stack
What is RFID software? RFID software is the layer that turns RFID hardware signals (readers, antennas, tags, sensors) into usable data and workflows—inventory updates, asset movements, shipping/receiving events, access logs, and analytics. In most real deployments, RFID systems require middleware: software that sits between RFID interrogators (readers) and enterprise applications (WMS/ERP/MES/POS). It manages/configures devices and processes raw tag data by filtering duplicates […]
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Knowledge
Feb 24, 2026
RFID Chip: What It Is, How It Works, Memory Banks, Types, and How to Choose the Right One
What is an RFID chip? An RFID chip is a small integrated circuit (IC) used in radio-frequency identification systems to store an identifier and/or data and communicate wirelessly with an RFID reader. In everyday conversations, “RFID chip” can mean two different things: Most people searching “rfid chip” are talking about the tag chip (the one […]
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