Radio Frequency Identification (RFID) technology uses electromagnetic fields to automatically identify and track tags attached to objects. RFID systems consist of a reader and a tag, which communicates data to the reader. There are two main types of RFID tags: active and inactive (also known as passive). Here's a comparison of the two:
Active RFID
1.Power Source: Active RFID tags have their own internal power source, usually a battery. The internal power allows the tag to broadcast its signal to the reader.
2.Range: Typically have a much longer read range, up to hundreds of meters. Suitable for applications where long-distance tracking is necessary.
3.Data Transmission: Can continuously transmit signals or be programmed to send data at specific intervals.
4.Cost: Generally more expensive due to the battery and more complex electronics.
5.Battery Life: Limited by the battery's lifespan, which can range from a few months to several years depending on usage and battery capacity.
6.Size: Usually larger due to the inclusion of the battery.
7.Applications: Used in environments where long-range tracking is essential, such as in logistics, asset tracking, and real-time location systems (RTLS).
Inactive (Passive) RFID
1.Power Source: Inactive RFID tags do not have their own power source. They are powered by the electromagnetic field generated by the RFID reader.
2.Range: Have a much shorter read range compared to active tags, usually a few centimeters to a few meters. Suitable for applications where close proximity scanning is acceptable.
3.Data Transmission: Only transmit data when they are within the range of an RFID reader.
4.Cost: Significantly cheaper than active tags, making them more suitable for widespread use.
5.Battery Life: Do not have a battery, so there is no concern about battery life.
6.Size: Smaller and lighter due to the absence of a battery.
7.Applications: Commonly used for access control, inventory management, supply chain management, and contactless payment systems.
Both types have their own advantages and are chosen based on the specific requirements of the application. Active RFID is ideal for scenarios needing long-range and continuous tracking, whereas passive RFID is suitable for close-range, cost-effective applications.
