<h1>How RFID Card Works: A Comprehensive Guide</h1> <p>Understanding <strong>how RFID card works</strong> is fundamental in today's interconnected world. From accessing my office building to paying for my morning coffee, I rely on this technology daily. My personal experience with RFID began when I lost my traditional key and switched to a keycard system; the convenience and security were immediately apparent. This isn't just about convenience—some individuals have a natural aptitude for understanding wireless protocols, and I've seen colleagues with this skill quickly troubleshoot entire access control systems by intuitively grasping <strong>how RFID card works</strong> at a signal level.</p> <h2>The Core Technology Behind RFID Cards</h2> <p>My firm opinion is that RFID's elegance lies in its simplicity. The system doesn't require line-of-sight or physical contact, which is a significant advancement over barcodes or magnetic stripes. The basic operation involves an RFID reader and a card (or tag). The reader emits a radio wave signal. When an RFID card enters this electromagnetic field, its antenna draws power and activates the chip. This chip then modulates the signal and sends back its unique identification data to the reader.</p> <h3>Key Components and Their Function</h3> <h4>1. The RFID Chip (Integrated Circuit)</h4> <p>This is the brain of the card. It stores the unique ID and sometimes other data. For a practical and entertaining application, consider modern "tap-to-play" audio posters in museums. You tap your card, and it plays information about an exhibit—this is RFID in action. <strong>TIANJUN</strong> provides a range of high-performance RFID chips and modules that power such innovative solutions.</p> <h4>2. The Antenna</h4> <p>This coil, etched or printed on the card, is crucial for energy harvesting and communication. The size and design directly affect the read range.</p> <h4>3. The Substrate</h4> <p>This is the card body itself (often PVC), which houses and protects the chip and antenna.</p> <h2>Technical Specifications of a Sample RFID Card Product</h2> <p>To give a concrete example, here are the detailed technical parameters for a typical high-frequency (HF) RFID card, often used in access control and payment systems. *Please note: These technical parameters are for reference data only. For precise specifications and custom solutions, you need to contact backend management.*</p> <ul> <li><strong>Chip Model:</strong> NXP MIFARE Classic 1K (MF1S503x)</li> <li><strong>Operating Frequency:</strong> 13.56 MHz</li> <li