Transmission unit and method for transmitting an information item, in particular for an anti-theft protection system of a motor vehicle

摘要

A transmission unit includes a sine-wave generator that generates a carrier oscillation. A binary information item is modulated onto the carrier oscillation in a modulator. The modulated oscillation is fed to a transformer that forwards the modulated oscillation to a plurality of antennas connected in parallel. A method for transmitting an information item includes providing a generator having a primary side and a secondary side, a modulator, a transformer, and a plurality of antennas. The plurality of antennas is connected to the secondary side of the transformer. An information item to be transmitted is created. A sinusoidal carrier oscillation is generated. The information item is modulated onto the carrier oscillation and forms a modulated oscillation. The modulated oscillation is transformed from the primary side to the secondary side and an electromagnetic field is generated by the plurality of antennas to aid transmission of the information item. The transmission unit and the method for transmitting provide little interference radiation. The transmission unit and the method for transmitting may be used for an anti-theft protection system of a motor vehicle.