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RFID (Radio-Frequency Identification) tags are electronic devices that use radio waves to wirelessly transmit data to an RFID reader. These tags consist of an integrated circuit (IC) and an antenna, allowing them to communicate with RFID readers within a certain range. Here’s a general description of RFID tags:

1. **Identification Technology:**
– RFID tags are part of an identification technology that enables the wireless transfer of data between the tag and an RFID reader.

2. **Components:**
– RFID tags typically consist of an integrated circuit (IC) and an antenna. The IC contains the unique identifier and other data, while the antenna facilitates communication.

3. **Frequency Bands:**
– RFID operates at different frequency bands, such as low frequency (LF), high frequency (HF), and ultra-high frequency (UHF), each offering distinct advantages and use cases.

4. **Passive or Active:**
– RFID tags can be passive or active. Passive tags rely on the energy from the RFID reader to power the IC for data transmission. Active tags have their own power source (battery) for longer-range communication.

5. **Read-Only or Read/Write:**
– RFID tags can be read-only, meaning the data is pre-programmed and cannot be altered, or read/write, allowing data to be updated or modified.

6. **Application Diversity:**
– RFID tags find applications in various industries, including retail, logistics, healthcare, transportation, access control, and more.

7. **Contactless Operation:**
– One of the main advantages of RFID technology is its contactless operation. The tag does not need to be in direct line of sight with the reader for communication.

8. **Data Storage Capacity:**
– The amount of data that an RFID tag can store varies depending on the type of tag. Some are designed for storing a small amount of data, while others have more extensive memory.

9. **Security Features:**
– RFID tags can incorporate security features, such as encryption and authentication, to protect the transmitted data from unauthorized access.

10. **Read Range:**
– The read range of an RFID tag depends on factors like frequency, power source (for active tags), and environmental conditions. Some RFID systems have a short read range, while others can read tags from a distance.

11. **Durability:**
– RFID tags are designed to be durable and withstand various environmental conditions, making them suitable for use in challenging applications.

12. **Integration with IoT:**
– RFID technology plays a significant role in the Internet of Things (IoT), enabling seamless communication and data exchange between physical objects and digital systems.


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