Basic Tag Anatomy

An RFID tag is composed of an RFID chip (also called an Application Specific Integrated Circuit or ASIC), an antenna (sometimes called an inductor), and a power source. The RFID chip consists of modulation circuitry, control circuitry, memory, and a processor. Functionality of each of these elements depends on the kind of tag as well as the presence or absence of a power source. The following list highlights these items further:

  • Antenna/Inductor —The antenna, or inductor, receives a signal from the reader and radiates a response back to the reader. Whether the tag uses an induction coil or an antenna is a function of the frequency at which the tag is designed to operate:

    • Low Frequency and High Frequency tags normally use induction ...

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