Patent ID: 8884632

Claim:
A fill level measuring device working with microwaves according to the travel time principle for fill level measurement of fill substances located in containers, comprising: a measuring device electronics having a microwave generator for successive production of microwave signals having different wanted frequencies; a frequency-selective, passive antenna arrangement connected thereto, which has a plurality of antennas, which serve to successively transmit the different microwave signals into the container, and to receive their echo signals reflected back to said antenna arrangement, which has a plurality of frequency-selective elements, especially bandpass filters, in each case transmissive for one of the different wanted frequencies, and in which, via said antennas and said frequency-selective elements, for each of the different microwave signals and its echo signal, a uniquely associated signal path is specified, via which such microwave signal is transmitted into the container, and its echo signal, reflected back to the antenna arrangement, is received and fed to said measuring device electronics; and an apparatus, which is provided in said measuring device electronics and which associates successively arriving echo signals with the associated signal path.