Radar fill level measuring device for detecting the fill level of a medium with low permittivity in a container

Abstract

A radar fill level measuring device for detecting the level of a medium with low permittivity located in a container is shown and described, with a feed and receiving element arranged outside the container for generating and receiving electromagnetic radiation, with a measuring window in the wall of the container that is permeable to electromagnetic radiation, with a waveguide arranged in the container and extending over a level measurement range. The waveguide can be flooded by the medium. The feed and receiving element, the measuring window and the waveguide form a measuring path over which, during measuring operation, electromagnetic radiation generated by the feed and receiving element propagates through the measuring window and through the waveguide during measurement operation. Electromagnetic radiation reflected from a medium surface in the waveguide is guided back through the waveguide and through the measuring window to the feed and receiving element.

Dependencies are inferred from the claim text.