RFID and NFC technologies are incredibly commonplace in the modern world but what goes into making them? This is the theory and practice behind the technology. - by IntegraSources rfid nfc
Radio-frequency identification and near-field communication are two similar technologies used in many industries. Their fields of application include inventory tracking, location tracking, access control, contactless payments, logistics, manufacturing, marketing, retail, and more. In this article, we are going to talk about these systems from an electronics design perspective. We will also take a look at RFID and NFC device development cases.
RFID systems can operate at different frequencies. They commonly use the following radio frequency bands. Note that the bands are defined by national standards and regulations., particularly 120-140 kHz. In ideal conditions, these radio waves can travel up to 50 cm. But in practice, their range does not exceed 10-20 cm. LF RFID tags do not have security standards. So, they are not recommended for applications requiring encrypted communication. They can also penetrate through metals and liquids.
RFID readers can be either active or passive. Depending the type of readers and tags, RFID systems can be classified as follows:ARPT systems. Both elements have power sources. Semi-passive tags can also be used here. Designing a printed circuit board for an RFID or NFC-enabled device starts with choosing a suitable reader. The choice is defined by various factors: the required read range, frequency band, environmental conditions, etc. The PCB will also require a microcontroller or a microprocessor, as well as various passive components. Another obligatory component is the antenna, but it is placed outside the board.
Our RFID device development resulted in a data terminal operating at 860-960 MHz with multiple modules. The terminal can read multiple tags simultaneously from a distance of several meters. The device is also equipped with a Newland EM2096 module for scanning 1D and 2D barcodes. The team used a USB Type C Amphenol 124019322112A connector for data transmission over USB 2.0 and battery charging. It has IPX4 level of protection, which makes it suitable for outdoor applications.
With the device we created, event participants can scan NFC tags placed on control points. The reader then transmits the data to a host computer used by the administration to let them know which team reached the point. The device can also perform a number of other tasks.
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