Download TDS RFID-125,134KHz Hard Reset File

RFID comes in two flavors, Active RFID and Passive RFID . Within passive RFID, there are three main tag / reader technologies on the market today, named after their respective frequency bands: low-frequency , high-frequency , and ultra-high-frequency . The Low Frequency (LF) band covers frequencies from 30 KHz to 300 KHz. Typically LF RFID systems operate at 125 KHz, although there are some that operate at 134 KHz. Within each passive RFID frequency band, there are a handful of ISO standards that need to be followed in order to facilitate reader to tag communication. the major standards for LF passive RFID frequency band is ISO 14223 and ISO/IEC 18000-2.

For an RFID system, its frequency band concept refers to the frequency range of the tag signal that the reader sends, receives, and reads through the antenna. From the application concept, the operating frequency of the radio frequency tag is also the operating frequency of the radio frequency identification system, which directly determines various aspects of the system application. In an RFID system, similar to how a radio must be tuned to different frequencies to hear different channels, RFID tags and readers have to be tuned to the same frequency in order to communicate.

The technical basis of RFID tags is divided into inductive coupling and electromagnetic coupling.The LF tags are based on inductive coupling technology which means that the RFID reader induces a current in the RFID tag which then powers the RFID tag and sends out some basic identification information to the RFID reader. LF tags are usually passive and do not require a power source or battery.Low Frequency RFID tags have a long wavelength and can penetrate thin metal surfaces (HF and UHF tags can usually not be used with metallic substances). They can also operate in environments with high water content – so fruits, liquids and even animal tagging.

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Low Frequency RFID systems are typically 125 KHz, though there are systems operating at 134 KHz as well. This frequency band provides a shorter read range (< 0.5m or 1.5 ft) and slower read speed than the higher frequencies.

Typical applications for UHF frequency RFID devices include: Supermarket and warehouse inventory control, motorway tolls.

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