RFID systems

RFID systems have invaded Spain and internationally, in almost all areas where it is necessary to control some data, usually in a massive way, whose monitoring in manual mode requires simplification to facilitate work, and streamline production.

RFID or Radio Frequency Identification is a method for remotely storing and retrieving data. The system is activated by electromagnetic energy transfer between a radio tag and an RFID transmitter. The radio tag composed of an electronic chip and an antenna receives the radio signal emitted by the reader also equipped with RFID technology. The components allow both to read and respond to signals.

Every day we use RFID products without knowing it: through transport cards, anti-theft tags in stores, RFID badges, security badges or more recently, contactless keys for cars. Therefore, we can distinguish different types of RFID systems based on these ranges.

Types of RFID systems

It mainly differentiates the types of radio frequency identification systems according to the wavelength of the working frequency with which its components are communicated.

They transmit data between their components at a faster speed and distance than other types of RFID systems. Despite this, this type of transmission is susceptible to interference when used in environments or installations in which airborne metals are present, as well as liquids in the form of moisture or stagnant.

Technology is beginning to solve this type of problem and UHF systems are starting to dominate the sector within their own ecosystem. They allow readings between components at distances ranging from 0.5 to 100 meters and use wave frequencies ranging from 860 MHz to 960 MHz depending on the continent.

The type of RFID system called high frequency or HF is the one commonly used for routine product labeling and tracking processes, whose ease of use is exploited in applications ranging from inventory control to bulk change price tracking of dates.

The working range in high frequency is significantly lower than in UHF, about one and a half meters of the maximum distance they reach while working. A little more sensitive to interference, the working frequency of RFID systems of this type is 13.56 MHz.

The type of system used to identify low frequencies is called RFID LF system and uses frequency ranges between 120 and 130 KHz. It is usually common to see them in access control systems, as well as in animal monitoring and control.

Having a longer wavelength than other systems, its reading range is reduced to very short distances that generally do not exceed 15 centimeters. The speed of data transmission between components is much slower. As a strong point, the longest wavelength is much more resistant to interference.

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