Passive RFID Readers

Key Characteristics of Passive RFID Readers:

Range: Passive RFID readers typically have a shorter read range compared to active RFID readers, usually from a few centimeters up to a few meters.
Cost: Passive RFID systems are generally less expensive than active ones due to the lower cost of the tags.
Durability: Since passive RFID tags have no internal power source, they tend to have a longer lifespan and are more durable in harsh environments.

Applications of Passive RFID Readers:

Inventory Management: Retail and warehousing use passive RFID readers to track items.
Access Control: They are used in security systems to grant or deny access based on the RFID tag's data.
Supply Chain Management: They help in tracking goods and materials through various stages of the supply chain.

How Passive RFID Readers Work:

Energy Transmission: The passive RFID reader emits a radio frequency signal through its antenna.
Tag Activation: When a passive RFID tag enters the electromagnetic field produced by the reader, it draws power from this signal. This activates the tag and enables it to send back its stored information to the reader.
Data Capture: The reader captures the information transmitted by the tag, which typically includes a unique identifier (ID) and possibly other data, depending on the tag’s configuration.
Data Processing: The reader then processes this information, which can be used for various applications, such as inventory tracking, access control, or asset management.