Patent ID: 7895889

Claim:
A radar level gauge system, for determining a filling level of a product contained in a tank, said radar level gauge system comprising: a transceiver including: a signal generator for generating electromagnetic signals for transmission; a transmitter branch for transmitting said electromagnetic signals; and a receiver branch for receiving electromagnetic signals; said radar level gauge system further comprising a propagation device for allowing transmitted electromagnetic signals to propagate towards a surface of said product inside the tank, where signals are reflected, and for returning reflected electromagnetic signals back from said surface of the product; processing circuitry connected to said transceiver and configured to determine said filling level based on said reflected electromagnetic signals; power sensing circuitry connected to said transceiver and configured to determine a received power level of received electromagnetic signals; and power level adjusting circuitry provided on said transmitter branch of the transceiver, connected to said power sensing circuitry, and configured to adjust a transmitted power level of said transmitted electromagnetic signals in response to said determined received power level of the reflected electromagnetic signals, wherein said power level adjusting circuitry is configured to adjust said transmitted power level in such a way that said received power level is kept below a predetermined threshold value, said predetermined threshold value being selected to keep a temporal average power transmitted by the radar level gauge system below a predetermined power level.