Yes, active RFID (Radio-Frequency Identification) systems require a reader or interrogator to function. Active RFID systems differ from passive RFID systems in that they use battery-powered RFID tags to transmit data to a reader, whereas passive RFID tags do not have their own power source and rely on the reader to provide the energy needed to transmit data.
Here's how an active RFID system typically works:
RFID Tags: Active RFID tags are equipped with their own power source (usually a battery) and an onboard transmitter. These tags are usually more expensive than
passive RFID tags but have a longer read range and can transmit data without relying on an external energy source.
Reader/Interrogator: The reader or interrogator is a device that emits radio waves to communicate with and collect data from the active RFID tags. It sends out signals to activate the tags and receive the data they transmit.
Communication: When an active RFID tag is within the read range of the reader, it responds by transmitting data, such as an identification code, sensor data, or other information. The reader captures and processes this data.
Data Processing: The reader processes the data received from the active RFID tags. Depending on the application, this data may be stored, transmitted to a central database, or used for real-time tracking and monitoring.
Active RFID systems are often used for applications where longer read ranges and real-time data transmission are necessary, such as tracking and monitoring high-value assets, people, or vehicles. The presence of a reader is essential in these systems to initiate communication with and collect data from the active RFID tags.
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