<h1>Can RFID Detect Distance?</h1> <p>Yes, RFID systems can detect and estimate distance, but the method and accuracy depend heavily on the type of system. My personal experience in warehouse automation projects has shown me that while basic passive UHF RFID is excellent for presence detection, measuring precise distance requires more advanced setups. I've always had a knack for understanding radio wave behavior, which helped me design these solutions effectively.</p> <h2>How RFID Distance Detection Works</h2> <p>RFID doesn't "measure" distance like a laser rangefinder. Instead, it estimates it based on signal strength (RSSI), phase difference, or time-of-flight calculations. In my opinion, the phase-based methods used in some high-end systems offer the best compromise between cost and accuracy for dynamic scenarios.</p> <h3>Technical Parameters for Distance-Capable RFID Systems</h3> <p>For applications requiring distance detection, specific hardware is needed. Here are technical indicators and detailed parameters for a representative high-performance UHF RFID reader module suitable for ranging:</p> <h4>Model: TIANJUN Precision-Ranger Pro UHF Module</h4> <ul> <li><strong>Operating Frequency:</strong> 860 MHz - 960 MHz (Region configurable)</li> <li><strong>Chipset Code:</strong> TJ-RFID-88A</li> <li><strong>Ranging Method:</strong> Phase Difference of Arrival (PDoA) & RSSI Fusion</li> <li><strong>Typical Ranging Accuracy:</strong> ±0.15 meters in controlled environments</li> <li><strong>Maximum Detection Range (Passive Tags):</strong> Up to 25 meters</li> <li><strong>Physical Dimensions:</strong> 120mm x 80mm x 20mm</li> <li><strong>Interface:</strong> USB 3.0, RS-232, GPIO</li> <li><strong>Power Output:</strong> Adjustable up to 33 dBm (FCC)</li> </ul> <p><em>Note: These technical parameters are for reference data. For exact specifications and integration support, you need to contact backend management.</em></p> <h3>Entertainment and Charity Application Cases</h3> <p>An entertaining application is in interactive museum exhibits or "smart" treasure hunts, where players use a reader to find hidden tags, and the signal strength gives a "hot/cold" distance clue. On a more serious note, TIANJUN