A radio frequency identification (RFID) tag includes an antenna operable to receive a radio frequency (RF) signal having a carrier frequency. The RFID tag further includes a tank circuit coupled to the antenna. The RFID tag further includes a tuning circuit operable to determine a received power level of the RF signal at the carrier frequency, determine whether the received power level is lower than a power level threshold. When the received power level is lower than the power level threshold: tuning circuit increases the input impedance of the RFID tag, determines a most recent power level of the received RF signal, and compares the most recent power level with the received power level. When the most recent power level is greater than the received power level, the tuning circuit incrementally increases the input impedance until the received power level is substantially equal to the power level threshold.

A radio frequency identification (RFID) tag includes an antenna operable to receive a radio frequency (RF) signal having a carrier frequency. The RFID tag further includes a tank circuit coupled to the antenna. The RFID tag further includes a tuning circuit operable to determine a received power level of the RF signal at the carrier frequency, determine whether the received power level is lower than a power level threshold. When the received power level is lower than the power level threshold: tuning circuit increases the input impedance of the RFID tag, determines a most recent power level of the received RF signal, and compares the most recent power level with the received power level. When the most recent power level is greater than the received power level, the tuning circuit incrementally increases the input impedance until the received power level is substantially equal to the power level threshold.

A radio frequency identification (RFID) tag includes an antenna operable to receive a radio frequency (RF) signal having a carrier frequency. The RFID tag further includes a tank circuit coupled to the antenna. The RFID tag further includes a tuning circuit operable to determine a received power level of the RF signal at the carrier frequency, determine whether the received power level is lower than a power level threshold. When the received power level is lower than the power level threshold: tuning circuit increases the input impedance of the RFID tag, determines a most recent power level of the received RF signal, and compares the most recent power level with the received power level. When the most recent power level is greater than the received power level, the tuning circuit incrementally increases the input impedance until the received power level is substantially equal to the power level threshold.

A radio frequency identification (RFID) tag includes an antenna operable to receive a radio frequency (RF) signal having a carrier frequency. The RFID tag further includes a tank circuit coupled to the antenna. The RFID tag further includes a tuning circuit operable to determine a received power level of the RF signal at the carrier frequency, determine whether the received power level is lower than a power level threshold. When the received power level is lower than the power level threshold: tuning circuit increases the input impedance of the RFID tag, determines a most recent power level of the received RF signal, and compares the most recent power level with the received power level. When the most recent power level is greater than the received power level, the tuning circuit incrementally increases the input impedance until the received power level is substantially equal to the power level threshold.

A method for execution by a RFID tag includes receiving, by an antenna of the RFID tag, an RF signal from an RFID reader, where the RF signal has a carrier frequency. The method further includes determining, by a tuning circuit of the RFID tag, a received power level of the RF signal at the carrier frequency and whether the received power level compares favorably to a power level threshold. When the received power level compares unfavorably to the power level threshold, the method further includes adjusting, by the tuning circuit, the input impedance of the RFID tag by adjusting a tank circuit of the RFID tag until the received power level compares favorably to the power level threshold, where the input impedance of the RFID tag is based on one or more of impedance of the antenna and impedance of the tank circuit.

A method for execution by a RFID tag includes receiving, by an antenna of the RFID tag, an RF signal from an RFID reader, where the RF signal has a carrier frequency. The method further includes determining, by a tuning circuit of the RFID tag, a received power level of the RF signal at the carrier frequency and whether the received power level compares favorably to a power level threshold. When the received power level compares unfavorably to the power level threshold, the method further includes adjusting, by the tuning circuit, the input impedance of the RFID tag by adjusting a tank circuit of the RFID tag until the received power level compares favorably to the power level threshold, where the input impedance of the RFID tag is based on one or more of impedance of the antenna and impedance of the tank circuit.

A method for execution by a RFID tag includes receiving, by an antenna of the RFID tag, an RF signal from an RFID reader, where the RF signal has a carrier frequency. The method further includes determining, by a tuning circuit of the RFID tag, a received power level of the RF signal at the carrier frequency and whether the received power level compares favorably to a power level threshold. When the received power level compares unfavorably to the power level threshold, the method further includes adjusting, by the tuning circuit, the input impedance of the RFID tag by adjusting a tank circuit of the RFID tag until the received power level compares favorably to the power level threshold, where the input impedance of the RFID tag is based on one or more of impedance of the antenna and impedance of the tank circuit.