Funkfrequenzidentifikation

Funkfrequenzidentifikation, often abbreviated as RFID, is a technology that uses radio waves to automatically identify and track tags attached to objects. These tags contain electronically stored information that can be read by an RFID reader. The system consists of three main components: the RFID tag, the RFID reader, and an antenna. The tag, which can be active or passive, has a microchip and an antenna. Passive tags draw power from the reader's radio waves, while active tags have their own power source, allowing for longer read ranges. The reader emits radio waves that energize the tag's antenna, causing it to transmit its data back to the reader. The antenna is crucial for both transmitting the signal to the tag and receiving the signal back. RFID technology finds applications in a wide range of fields, including inventory management, supply chain logistics, access control, toll collection, and animal tracking. Its ability to identify objects without direct line-of-sight contact, unlike barcode systems, makes it particularly versatile. The frequency bands used in RFID vary, with common ones being low frequency (LF), high frequency (HF), and ultra-high frequency (UHF), each offering different read ranges and data transfer speeds.