Near Field Communication (NFC) is a short-range wireless communication standard similar to BLE or Wi-Fi, but works over short range typically 10cm or less. NFC is a radio frequency (RF) signal initiated by an active NFC device such as a smartphone or reader, and another active or passive device such as an NFC tag to transfer data.
All NFC tags consist of an antenna coil and a small chip that is boned to the antenna. When a mobile phone is within range of anNFC tag, its antenna becomes energized and powers the chip, which stores data. This antenna plus chip combo can be embedded inside a variety of form factors: circular/square stickers, business cards, access control cards, keychains, bank cards and even e-passports. Typically, the larger the antenna the longer the read range. The chip memory size ranges from 144 bytes, large enough to store a URL, to 36 kilobytes to store a person’s photo on an e-passport.
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