“…From a technological viewpoint, tags can be used for different purposes, depending on their characteristics. We assume the classification proposed in , namely, according to the power supply system, we distinguish among Active Tags, which integrate batteries and transceivers, Passive Tags, which reflect the radio signal coming from an antenna or a reader and send it back adding information by modulating the reflected signal, and Semi‐Passive Tags, namely a hybrid solution. When a device is excited by the antenna radio beam, a tag sends back a signal powered by the internal battery.…”