G - Physics – 01 – F
Patent
G - Physics
01
F
G01F 23/28 (2006.01) G01F 23/284 (2006.01)
Patent
CA 2316497
The invention relates to a device (1) for determining the filling level in a container (4). Moreover, the invention also relates to a method for fastening an input coupling unit (9) on the antenna (7), the antenna (7) being used in the device (1) according to the invention. It is the object of the invention to propose overvoltage protection for an antenna (7), and a method for producing such an antenna (7). The object is achieved with regard to the device (1) according to the invention by virtue of the fact that the antenna (7) comprises at least two dielectric layers (12, 13), that the first dielectric layer (12) has at least one cutout (15) for holding the input coupling unit (9), that the second dielectric layer (13) bears an antenna structure (16) on the side facing the first dielectric layer (12) and has a conductive coating (17) with openings (18) on the side averted from the first dielectric layer (12), that there are provided in the second dielectric layer (13) and the conductive layer (17) contacts (19) which connect the input coupling unit (9) to the conductive coating (17), and that the region of space defined by the contacts (19), the conductive coating (17) and the antenna housing (30) forms a Faraday cage.
Birgel Dietmar
Hauptvogel Karl-Peter
Malzahn Thomas
Muller Roland
Endress + Hauser Gmbh + Co.
Smart & Biggar
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