RFID technology allows the identification of objects, animals or people through a radio frequency transponder (or tag). The system is composed not only of the already mentioned tag, but also of a device with antenna (controller or reader) which is generally connected to the central system (PC, server or cloud system).
The transponder tag can be passive, i.e. without battery, or active, i.e. with integrated battery.
The passive tag is equipped with a capacitor that once charged by the electromagnetic field generated by the controller, allows you to give energy to the antenna of the tag which will propagate the signal with the information present in the chip of the same.
In the case of active transponders, the battery supports the signal propagation and allows to reach longer reading distances. Generally, active RFID tags have proprietary protocols and are not standardized. Due to the high costs and the lack of flexibility of active RFID tags, they are not discussed here and are not proposed. The choice of Global tag was instead to use the BLE technology (discussed here), which thanks to the standardization is compatible with Bluetooth 4.0+ devices and available worldwide.
Passive RFID technology is divided into three frequencies: LF 125Khz, HF 13.56Mhz and UHF (860-960MHz). Each frequency has its own peculiarities. The ability to choose the correct frequency is essential for the success of the project, as it is essential to choose the correct transponder tag, able to be detected at the required distances, to withstand mechanical stress and to have appropriate size and shape. It is therefore important to have the possibility to propose RFID technology at 360°. With this in mind, we have created a wide product portfolio, which embraces all frequencies and all chips. Below is a list of chips with the main functions of each one.