An UHF chip that one is. The reading range can go rather high once you have the matching reader.
Tattooing antenna is what I m not sure about… Above sound frequency you need to encounter parasite capacity (not sure about the term in English?) so you either have to be super precise or leave room for tuning. Aka you bend the coil or solder a blob and the characteristics changes.
Cool tech, but we unlikely to see UHF readers in phones… ever.