Radar fill level measurement device

A radar based fill level measurement device for measuring the fill level of a material in a container, comprising:

• an electronics unit, which serves to generate a transmission signal, and serves to process a received signal, said received signal containing a reflected portion of the transmission signal, said reflected portion being reflected from a surface of the material whose distance is to be measured;
• and
• a coaxial waveguide probe, wherein:
• said electronics unit comprises a signal generator to generate a frequency modulated transmission signal,
• said electronics unit comprises a processor to process the received signal using phase information comprised in the received signal;
• said processor calculates an expected phase response of the received signal (RX) as a function of the distance of the surface of the material;
• said processor determines the phase of the received signal (RX) at a frequency peak (X) of the received signal;
• wherein said frequency peak (X) corresponds to said distance, and
• said processor compares said determined phase with the expected phase response at said distance;
• and
• said coaxial waveguide probe serves for guiding the transmission signal and the received signal.