Apparatus for determining and/or monitoring the level of a...

Details Apparatus for determining and/or monitoring the level of a... Apparatus for determining and/or monitoring the level of a...

2007-06-14

2011-10-18

Tarcza, Thomas (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Determining distance

Material level within container

C324S364000, C324S637000

Reexamination Certificate

active

08040274

ABSTRACT:
An apparatus for ascertaining and/or monitoring fill level of a medium in a container. The apparatus includes an antenna, which transmits and receives high frequency signals in a predetermined oscillatory mode in a bounded space in a predetermined radiation direction, wherein, in front of the antenna in the radiation direction, an antenna protection element of a material transmissive for the high frequency signals is provided, and wherein a control/evaluation unit is provided, which evaluates the received high frequency signals and ascertains the fill level.

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James C. Wiltse, “Recent Developments in Fresnel Zone Plate Antennas at Microwave/Millimeter Wave”, Proceedings of SPIE—Conference on Optical Analogies in Microwave/Millimeter-Wave Design, Bd. 3464, Oct. 1, 1998, XP002449132, San Diego, CA.

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