Patent ID: 6779397
Filing Date: 2004-08-24
Classification: G01F

Abstract:
A device for determining the filling level of a filling material in a container, the filling material defining a surface, the device comprising:signal-generating unit, which generates electromagnetic measuring signals; an antenna; a transceiver unit, which emits the measuring signals via said antenna in the direction of the surface of the filling material and which receives echo signals reflected from the surface of the filling material; and an evaluation unit which determines the filling level in the container from the propagation time of the measuring signals, wherein: said antenna comprises a waveguide which widens in the direction of emission into a cavity of a defined shape; at least one dielectric filling material which at least partially fills up said waveguide, and which virtually completely fills up said widened cavity; and said dielectric filling material defines an outer surface which is shaped as a lens.