NFCtekniikkaa

NFCtekniikkaa, or Near Field Communication technology, is a set of short-range wireless technologies that enable communication between two electronic devices within a close proximity of about four centimeters or less. It is a specialized subset of radio-frequency identification (RFID) that uses electromagnetic radio waves to transmit data. NFC technology allows for contactless payments, data exchange, and simple wireless connections between devices.

The core functionality of NFC relies on inductive coupling between two loop antennas when they are brought close together. One device, often called the initiator, generates a radio frequency field that powers the other device, known as the target. This allows for communication even if the target device does not have its own power source, making it ideal for passive tags or cards. NFC operates at a frequency of 13.56 MHz and supports data transfer rates up to 424 kbit/s.

NFCtekniikkaa finds application in various domains. The most common use is in contactless payment systems, where a smartphone or payment card can be tapped against a terminal to complete a transaction. It is also used for access control, such as unlocking doors or boarding public transport. In mobile devices, NFC enables quick pairing with Bluetooth accessories, sharing contact information, or initiating actions based on the proximity of NFC tags, often referred to as "smart tags." The technology is designed to be secure and convenient for everyday use, requiring intentional action to initiate a communication.