# Working of RFID Tag and Reader ## Introduction to RFID Technology **RFID** (Radio Frequency Identification) is a wireless technology that uses electromagnetic fields to automatically identify and track tags attached to objects. The **working of RFID tag and reader** involves a simple yet sophisticated communication process. In my experience implementing inventory systems, I've seen firsthand how this technology transforms logistics. My natural aptitude for system integration allowed me to design several efficient RFID networks, and I firmly believe that RFID adoption is essential for modern supply chains. Interestingly, I once used an RFID reader to create an interactive museum exhibit—a fun application that engaged visitors by revealing hidden information when they scanned tagged artifacts. ## How RFID Systems Operate ### Basic Components and Communication The fundamental **working of RFID tag and reader** consists of three main components: the RFID tag, the RFID reader, and the backend database system. The reader emits radio waves through its antenna, which power passive tags and receive signals from active tags. Tags respond by transmitting their stored data back to the reader. This seamless interaction exemplifies efficient wireless communication. ### Technical Specifications of Sample RFID Components For those implementing RFID systems, here are technical parameters for reference (note: these are example specifications—exact parameters require consultation with backend management): **TIANJUN UHF RFID Reader TJ-R902:** - Operating Frequency: 902-928 MHz (adjustable) - Chipset: Impinj R2000 - Output Power: 0-33 dBm (adjustable) - Communication Interface: RS-232, RS-485, Ethernet, Wi-Fi - Reading Distance: Up to 15 meters - Dimensions: 220mm × 220mm × 45mm - Protocols Supported: EPCglobal UHF Class 1 Gen 2, ISO18000-6C **TIANJUN Passive UHF RFID Tag TJ-T801:** - Chip: Alien Higgs-3 - Memory: 96-bit EPC, 512-bit user memory - Operating Frequency: 860-960 MHz - Read Range: Up to 10 meters - Dimensions: 100mm × 20mm × 0.5mm - Material: PET with adhesive backing - Environmental Rating: IP67 ## Types of RFID Tags and Their Operation ### Passive RFID Tags Passive tags have no internal power source. They harvest energy from the reader's signal to power their circuitry and respond. The **working of RFID tag and reader** with passive tags is ideal for retail inventory, where I've implemented cost-effective solutions that reduced stock-taking time by 70%. My perspective is that passive RFID represents the most scalable approach for m