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What I Wish Everyone Knew About RFID Chips
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What I Wish Everyone Knew About RFID Chips

  • Categories:News
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  • Time of issue:2022-04-07 19:41
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What I Wish Everyone Knew About RFID Chips

RFID chips, the most important part of RFID tags, play a crucial role. RFID chip usually has a built-in antenna and an integrated circuit IC. Antennas can send and receive radio waves, while IC is responsible for modulating and demodulating radio signals, as well as processing and storing data.

According to the working frequency, RFID chips can be divided into low-frequency (LF), high-frequency (HF), ultra-high-frequency (UHF) and microwave, etc. They work on different principles: LF and HF RFID chips use Electromagnetic Coupling Principle, while UHF and microwave adopt Electromagnetic Emission Principle.

At present, the frequencies widely used in the world are distributed in four wavebands: low frequency (125 kHz), high frequency (13.56MHz), ultra-high frequency (860MHz~960MFz) and microwave (2.45GHz). Each frequency has its characteristics and caters to different applications, so it is necessary to choose the appropriate frequency to use it correctly.

Low Frequency RFID Chips (LF RFID Chips)

The working frequency range of LF RFID chips is 30kHz~300kHz. Typical operating frequencies are 125 kHz and 132KHz. Low-frequency tags are generally passive tags that obtain energy from the radiation near the field of the reader coupling coil by inductive coupling. When transmitting data between the low-frequency chip and the reader, the low-frequency chip should be located in the near-field area radiated by the reader antenna. The reading distance is generally less than 1 meter.

What I Wish Everyone Knew About RFID Chips


  • Working Frequency: 30kHz~300kHz, Typical Working Frequency: 125 kHz~134.2 kHz
  • Protocol: ISO7814, ISO7815 (generally 3-10cm in distance), remote chip can achieve 1.5 meters.
  • Except for metal material, LF RFID Chips are able to pass through objects of any material without reducing its reading distance.
  • Compared with other frequency chips, LF RFID chips have a low data rate and can only read one at a time.
  • The system construction cost is relatively low, the label cost is high.
  • Although the magnetic field area of this frequency decreases rapidly, it can produce a relatively uniform read-write area.
  • RFID chips come in different packages. Good packaging is too expensive, but has a life of more than 10 years.


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