Patent ID: 7619581
Filing Date: 2009-11-17
Classification: G01F,H01Q

Abstract:
1. A parabolic aerial for a fill level radar, with the parabolic aerial, comprising: a parabolic mirror; an exciter for transmitting electromagnetic waves to the parabolic mirror; and a diffusion disc for laterally removing an interfering fraction of the electromagnetic waves past the exciter; wherein the parabolic mirror is designed to concentrate the electromagnetic waves; wherein the diffusion disc is arranged in the centre of the parabolic mirror; wherein the shape of the diffusion disc is such that a beam of parallel radiation that impinges the diffusion disc along an axis from the exciter is diverted from the axis by a backscatter process at the diffusion disc, and wherein the shape of the diffusion disc is such that electromagnetic waves, which after transmission from the exciter and reflection from the parabolic mirror, are diffused away from the exciter.