| 摘要 |
A fill level measuring device working with microwaves according to the travel time principle for measuring fill level of a fill substance in a container. Measurements are performable at two markedly different frequencies with a single antenna. The device includes: a transmitting and receiving system for producing a higher frequency microwave signal and a lower frequency microwave signal. The transmitting and nereceiving system includes a single antenna, which has an internally funnel shaped horn and two hollow conductor segments connected with one another and connected to the horn. The antenna additionally includes, a coaxial conductor connection, via which the antenna is fed with the lower frequency microwave signal and the associated lower frequency echo signal is received. The antenna additionally includes, connected to a horn-remote end of that one of the two hollow conductor segments arranged on an end of the hollow conductor segment adjoining the horn, a hollow conductor connection, via which the antenna is fed with the higher frequency microwave signal and the associated higher frequency echo signal is received.
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