Fill level device

A fill level measurement device comprising a fill level radar antenna, which comprises:

• a plurality of waveguide couplings for a radar antenna, wherein at least two of the waveguide couplings each includes:
• a. a radiator element configured to at least one of transmit or receive a radar signal, the radiator element being connected to a microstrip line;
• b. a waveguide configured to conduct the radar signal;
• and
• c. a substrate,
• wherein the microstrip lines, the radiator elements and the waveguides are arranged on the substrate,
• wherein, the respective waveguide includes a cross-sectional area that has a narrow side and a wide side, the narrow side being shorter than the wide side,
• wherein each of the microstrip lines is provided through the narrow side of the respective waveguide into the respective waveguide to the respective radiator element which resides in an interior of the respective waveguide,
• wherein each of the microstrip lines and each of the radiator elements are arranged on a surface of the substrate that faces the waveguides, and
• wherein adjacent ones of the radiator elements of the waveguides couplings are arranged at a distance from one another, the distance being smaller or equal to half of a wavelength of the radar signal.