A Frequency-Modulated Continuous Wave fill level radar, FMCW fill level radar, for fill level measurement of a product by means of a continuous wave radar, comprising: a transmitting device for a first frequency band and a second frequency band that is different from the first frequency band, a receiving device for the first frequency band and the second frequency band, an antenna device comprising a first narrowband subantenna adapted to transmit signals within the first frequency band from the transmitting device and/or to receive the signals reflected from the surface within the first frequency band and to forward the signals to the receiving device, and comprising a second narrowband subantenna adapted to transmit signals within the second frequency band from the transmitting device, and/or to receive the signals reflected from the surface within the second frequency band and to forward the signals to the receiving device, wherein the transmitting device, the receiving device and at least one of the subantennas are integrated together on a Radar System on Chip, RSoC, and a control unit that is configured to apply the signals within the first frequency band and within the second frequency band to the transmitting device, and to correlate the reflected signals within the first and second frequency bands received from the receiving device with the signals within the first and second frequency bands from the transmitting device, so that the FMCW fill level radar can transmit and receive a frequency range consisting of the first frequency band and the second frequency band, and determine the fill level of a product therefrom. a transmitting device for a first frequency band and a second frequency band that is different from the first frequency band, a receiving device for the first frequency band and the second frequency band, an antenna device comprising a first narrowband subantenna adapted to transmit signals within the first frequency band from the transmitting device and/or to receive the signals reflected from the surface within the first frequency band and to forward the signals to the receiving device, and comprising a second narrowband subantenna adapted to transmit signals within the second frequency band from the transmitting device, and/or to receive the signals reflected from the surface within the second frequency band and to forward the signals to the receiving device, wherein the transmitting device, the receiving device and at least one of the subantennas are integrated together on a Radar System on Chip, RSoC, and comprising a first narrowband subantenna adapted to transmit signals within the first frequency band from the transmitting device and/or to receive the signals reflected from the surface within the first frequency band and to forward the signals to the receiving device, and comprising a second narrowband subantenna adapted to transmit signals within the second frequency band from the transmitting device, and/or to receive the signals reflected from the surface within the second frequency band and to forward the signals to the receiving device, wherein the transmitting device, the receiving device and at least one of the subantennas are integrated together on a Radar System on Chip, RSoC, and a control unit that is configured to apply the signals within the first frequency band and within the second frequency band to the transmitting device, and to correlate the reflected signals within the first and second frequency bands received from the receiving device with the signals within the first and second frequency bands from the transmitting device, to apply the signals within the first frequency band and within the second frequency band to the transmitting device, and to correlate the reflected signals within the first and second frequency bands received from the receiving device with the signals within the first and second frequency bands from the transmitting device, so that the FMCW fill level radar can transmit and receive a frequency range consisting of the first frequency band and the second frequency band, and determine the fill level of a product therefrom.