![]() The reader ’ s transceiver demodulates and decodes the tag ’ s response, extracting the transmitted data. They emit continuous or pulsed radio waves to energize nearby tags and receive their responses. Data communication: RFID readers communicate with tags through electromagnetic coupling.Antennas can be designed as dipoles, loops, patches, or customized shapes depending on the application requirements. Higher-frequency RFID systems usually have smaller antenna sizes compared to lower-frequency systems. The size and shape of the antenna depend on the frequency band used and the desired read range. Antenna design: RFID antennas can be classified into linear polarized, circular polarized, and near-field antennas.The emitted waves serve as energy sources and communication carriers. ![]() Radio wave emission: RFID readers emit radio waves in a specific frequency band.Semi-passive tags use the reader ’ s energy for powering the IC but have a battery for signal transmission. Passive tags rely on the reader ’ s energy for power, while active tags have their own power source (battery) to actively transmit signals. Types of tags: RFID tags can be categorized as passive, active, or semi-passive (battery-assisted passive).The IC then modulates the radio waves and backscatters them to the reader, transmitting the stored data (UID and additional information). Data transfer: When energized by an RFID reader ’ s radio waves, the tag ’ s antenna receives power and activates the IC.Each frequency band has its advantages in terms of read range, data transfer speed, and resistance to interference. Frequency bands: RFID tags operate in different frequency bands, such as low frequency (LF: 125 kHz and 134 kHz), high frequency (HF: 13.56 MHz), and ultra-high frequency (UHF: 860-960 MHz).The IC contains non-volatile memory, which stores data and a unique identification number. Physical structure: RFID tags comprise an integrated circuit (IC) or microchip and an antenna.Let’s dive into the technical details of each component: RFID tags A backend system, which manages and processes the collected information.RFID readers, which wirelessly communicate with the tags.RFID tags, which are tiny devices that store data.This innovative system comprises three essential elements: Radio frequency identification (RFID) is a cutting-edge technology that harnesses radio waves to identify and monitor objects or people effortlessly without physical contact. What Is Radio Frequency Identification (RFID)? What Is Radio Frequency Identification (RFID)?.
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