UHF RFID system

what is LF  HF  UHF RFID System

what is LF HF UHF RFID System

  • Thursday, 27 February 2020
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    •                                         what is  LF  HF  UHF RFID System
    •         RFID systems can be broken down by the frequency band within which they operate: low frequency, high frequency, and ultra-high frequency. There are also two broad categories of systems—passive and active RFID. In the sections below we will explore the frequencies and types of RFID systems

      Frequency refers to the size of the radio waves used to communicate between system components. RFID systems throughout the world operate in low frequency (LF), high frequency (HF), and ultra-high frequency (UHF) bands. Radio waves behave differently at each of these frequencies and there are advantages and disadvantages associated with using each frequency band.

      For example, if an RFID system operates at a lower frequency, it has a slower data read rate, but increased capabilities for reading near or on metal or liquid surfaces. If a system operates at a higher frequency, it generally has faster data transfer rates and longer read ranges, but more sensitivity to radio wave interference caused by liquids and metals in the environment. However technology innovations in recent years have made it possible to use ultra-high frequency RFID systems around liquids and metals.

  • Low Frequency  LF RFID
  • The LF band covers frequencies from 30 KHz to 300 KHz. This frequency band provides a short read range of 10 cm, and has slower read speed than the higher frequencies, but is not very sensitive to radio wave interference. Kcosit  LF RFID applications include access control, chipping of pet animals, and livestock tracking. Standards for LF animal-tracking systems are defined in ISO 14223, and ISO/IEC 18000-2. The LF spectrum is not considered a truly global application because of slight differences in frequency and power levels throughout the world.
  • High-Frequency (HF) RFID
  • The HF band ranges from 3 to 30 MHz. Most HF RFID systems operate with read ranges between 10 cm and 1 m. HF systems experience moderate sensitivity to interference, and HF RFID is commonly used for secure services such as ticketing, payment, data transfer applications, and some proximity/smart card technology.
  • There are several HF RFID standards in place, such as the ISO 15693 standard for tracking items, and the ECMA-340 and ISO/IEC 18092 standards for Near Field Communication (NFC), a short range technology that is commonly used for data exchange between devices. Other HF standards include the ISO/IEC 14443 A and ISO/IEC 14443 standards for MIFARE technology, which used in smart cards and proximity cards, and the JIS X 6319-4 for FeliCa, which is a smart card system commonly used in electronic money cards
  • Ultra-high frequency (UHF) RFID
    The latest worldwide standard in passive RFID is Ultra High Frequency. The UHF frequency band covers a range of 300 MHz to 3 GHz. Systems complying with the UHF Gen2 standard for RFID use the 860 to 960 MHz band. The read range of passive UHF systems can be as long as 12 m, and UHF RFID has a faster data transfer rate than LF or HF. UHF also supports multiple tag reading (i.e. reading more RFID tags at once) which LF and HF do not. To counter interference, research and development has created successful designs for tags, antennas, and readers.
  • UHF RFID is used in a wide variety of applications; ranging from retail inventory management, to pharmaceutical anti-counterfeiting, to wireless device configuration. The bulk of new RFID projects are using UHF, making it the fastest growing segment of the RFID market.


    Ultra high frequency technology, referred to as RAIN RFID, is the fastest growing segment on the RFID market. The majority of new RFID projects are using UHF, as opposed to HF or LF systems. To date, UHF technology has over 20 billion connected items providing real-time visibility and data to a myriad of everyday items. UHF systems are known for generating long read ranges, up to twelve meters (forty feet), whereas HF systems carry a much shorter read range of approximately one meter (three feet). UHF allows for a faster data transfer rate, up to 20 times the range and speed of HF systems. This enables quicker transaction capture times and faster data processing.

    As UHF solidifies its position as the global standard and preferred RFID technology across vertical markets, tag prices continue to drop. In 2017, UHF RFID tags cost approximately $.05 to $.15 per tag, whereas HF tags range from $.50 to $2.00 per tag.

    Using a UHF RFID system eliminates the need for manual processes, thus increasing inventory visibility and automating workflows. There are countless benefits to incorporating UHF RFID systems into healthcare and life science markets, including:  

    • Gain real-time visibility of inventory
    • Automate inventory tracking and workflows
    • Prevent use of expired or recalled products
    • Meet industry regulations such as FDA, UDI, and JHACO
    • Remotely monitor temperature and inventory alerts
    • Reduce shrinkage and prevent inventory stock-outs
    • Secure access to specified areas or products
    • Improve overall business operations 

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