A RADIO FREQUENCY TAG

摘要

The invention relates to a radio frequency tag. The tag comprises a receiver for receiving radio frequency waves having an amplitude spectrum provided with a first frequency component and a second frequency component. The tag also comprises a converter associated with the receiver for generating a signal having a frequency component at the frequency difference between the first frequency and the second frequency. In addition, the tag comprises a signal circuit for processing the generated signal and a coupler for forwarding the generated signal from the receiver towards the signal circuit. The signal circuit comprises a transmitter for transmitting the generated signal as a transmitted radio wave. Further, the transmitter comprises a magnetic loop antenna including a resonant LC loop.