Abstract: A radio frequency identification (RFID) tag and a method of monitoring Quality of Service (QoS) of a RFID tag The RFID tag (200) comprising: a first communication module (201) to receive signals from a RFID reader (100) and including means for extracting energy from the received signals providing a supply voltage Vdd to the RFID tag (200); an energy storage module (203) to store said extracted energy from the received signals of the RFID reader (100); a second communication module (202) to communicate with an external device (300); a power output (204) to provide a power-supply voltage to the external device (300) using said stored energy; a control module (205) to perform a tracking of said power-supply voltage provided by said power output (204), wherein the first communication module (201) also transmits to the RFID reader (100) a quality indicator of an energy status of the RFID tag (200) based on the result of said tracking.

Abstract: A radio frequency identification (RFID) tag and a method of monitoring Quality of Service (QoS) of a RFID tag The RFID tag (200) comprising: a first communication module (201) to receive signals from a RFID reader (100) and including means for extracting energy from the received signals providing a supply voltage Vdd to the RFID tag (200); an energy storage module (203) to store said extracted energy from the received signals of the RFID reader (100); a second communication module (202) to communicate with an external device (300); a power output (204) to provide a power-supply voltage to the external device (300) using said stored energy; a control module (205) to perform a tracking of said power-supply voltage provided by said power output (204), wherein the first communication module (201) also transmits to the RFID reader (100) a quality indicator of an energy status of the RFID tag (200) based on the result of said tracking.

Abstract: The RFID tag comprising: a first communication module (201) for extracting energy from received signals from a RFID reader providing a supply voltage VDD to the RFID tag (200); an energy storage module (203) to store said extracted energy from the received signals; a first voltage limiter (205) adapted and configured to limit, during a start-up state of the RFID tag (200), said supply voltage VDD; and a second voltage limiter (206), different to and synchronized with said first voltage limiter (205), said second voltage limiter (206) being adapted and configured to be enabled during a stationary state of the RFID tag (200) by switching from the first voltage limiter (205) to the second voltage limiter (206), the first voltage limiter (205) having a fast response time and the second voltage limiter (206) having high and accurate limitation voltage in powered operation.

Abstract: The invention relates to a system and method for measuring a physical quantity wirelessly, with a emitter and a passive receiver. On the emitter side, the system comprises an RFID emitter in communication with the RFID receiver. On the receiver side, the system comprises an RFID receiver module, energy storage means supplied by the receiver module, a monitoring module for monitoring the stored energy, a microcontroller module with analog-to-digital conversion means, a measurement module, and an enabling module for enabling the microcontroller module. By means of the monitoring module, the system is adapted to taking periodic measurements only when requested, such that even though peak consumptions are relatively high while taking the measurement, mean consumption remains at values that are low enough to supply the measurement module with the energy stored in the energy storage means without requiring any auxiliary energy source.