Radio frequency identification (RFID) is a technology enabling a contactless exchange of data. This technology features the possibility to wirelessly transfer power to the transponder (opponent). High Frequency RFID is used in mobile devices like smart phones and shows potential for applications like payment, identification, etc. Unfortunately, the needed functionality increases the battery drain of the device. As a countermeasure, power-management techniques are implemented. However, these techniques commonly do not consider the whole system, which also consists of the communication to the transponder, to prevent wasting energy. One cross-system technique of reducing the wasted energy is magnetic field strength scaling, which regulates the power transfer to the transponder.
HF-band radio frequency identification (RFID) is a wireless form of communication. One feature of this wireless communication form is the possibility to transfer power from the reader (sender) to the transponder (receiver). There are many standards using this communication form. One of them is near field communication (NFC). An exemplary application of NFC is using it in mobile devices like smart phones, which opens a wide set of applications like payment, identification, and ticketing. Unfortunately, NFC increases the battery drain, because of the additional power-consumption needed by the reader during communication. Minimizing this consumption is the goal of the power-management algorithms implemented in software and hardware. These algorithms commonly focus on one component and do not consider the whole system.
High Frequency RFID Applications
Primary applications are in RFID tags for use in gaming, healthcare, pharmaceuticals, document and media management. The German identity card contains an ISO/IEC 18000-3 and ISO/IEC 14443 type A compatible 13.56 MHz RFID chip that uses the ISO/IEC 7816 protocols.
