Patent ID: 6927734
Filing Date: 2005-08-09
Classification: G01F,H01Q

Abstract:
1. An antenna assembly suitable for use in a level measurement device for measuring the level of a material in a container, the antenna assembly comprising: (a) a rod antenna having a lower end and an upper end; (b) a coupling sleeve defining a tubular passage and including a coupling mechanism for coupling with the container, the coupling sleeve being coupled to the upper end of said rod antenna such that the upper end of said rod antenna closes one end of the tubular passage; and (c) a transition structure extending longitudinally into the tubular passage, the transition structure including: wherein said dielectric material has a longitudinal axis, and wherein said dielectric material defines a coaxial bore extending longitudinally from the top end into said dielectric material and terminating in a distal end, wherein the coaxial bore is circular in cross-section and includes a tapered conical tip at the distal end.