A small note about RFID technology applied to public safety. Part 1: RFID tag antenna design

In order to have strict enforcement of the rules in jails and increase the public safety, the implantation of radio frequency identification (RFID) tag into the human body, specifically into the molar tooth of the prisoner, may give an alternative to face the crime problem in Mexico. The information data contained into the tag allow to know in real time the prisoner identification, the prisoner location into the jail in order to prevent escape attempts, prisoner medical history, etc. This is a challenge due to it is necessary to design a RFID tag antenna which dimensions must be enough small size for be assembled with the other components into an adult human molar tooth, moreover, it should satisfy the gain, resonance frequency, impedance requirements, as well as bandwidth requirements (low KHz) and low cost. This way the focus of this work is the tag antenna design for this application.