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Printed circuit board for a radar level measurement device with waveguide coupling

A technology of level measurement and circuit board, which is applied in the direction of measuring devices, radio wave measurement systems, waveguides, etc., to achieve the effect of preventing environmental influence and benefiting mechanical stability

Active Publication Date: 2019-07-12
VEGA GRIESHABER GMBH & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A particular challenge lies in waveguide transitions, i.e., where electromagnetic waves are launched from a conductor (e.g., on a circuit board) into the interior of a waveguide and vice versa

Method used

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  • Printed circuit board for a radar level measurement device with waveguide coupling
  • Printed circuit board for a radar level measurement device with waveguide coupling
  • Printed circuit board for a radar level measurement device with waveguide coupling

Examples

Experimental program
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Embodiment Construction

[0040] figure 1 A partial area of ​​the circuit board 10 for coupling waveguides 14 is shown. A microwave conductor 16 is arranged on the circuit board substrate 12 . In the example shown here, the microwave conductor 16 extends over the surface of the circuit board substrate 12 , here the microwave conductor 16 extends over the front side 18 . According to one example (not shown here), the microwave conductor 16 is arranged inside the circuit board substrate 12 . The advantage is that, with figure 1 Contrary to what is shown, there is no need to separate or shorten the waveguide 14 at this location additionally for the purpose of insulation, but the waveguide 14 has a circumferential planar or flat end face, the advantage of which is simple manufacturing (for example, cutting ).

[0041] The circuit board substrate 12 is made of a material that is inactive for high frequencies or is insulating for the relevant high frequency range (for example LCP or PTFE substrates of va...

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PUM

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Abstract

A printed circuit board (10) for a radar level measurement device with a printed circuit board substrate (12) is provided, wherein a microwave signal is coupled via a microwave conductor (16) into a waveguide (14). A connection region (22) on a front side (18) of the printed circuit board substrate (12) serves to receive the waveguide (14). A shape of a resonator shell is generated inversely by producing an annular peripheral recess (30) whose wall has an electromagnetically reflecting coating (32) on a rear side (28) of the printed circuit board substrate (12). The annular peripheral recess (30) on the rear side (28), together with a region (34) surrounded by the recess, forms a resonator for the injected microwave signals.

Description

technical field [0001] The invention relates, for example, to the measurement of a level in a container. In particular, the invention relates to a circuit board for a microwave-based or radar-based level measuring device with microwave coupling means in the waveguide. Background technique [0002] Known fill level measuring devices increasingly use the principle of determining the fill level using the propagation of electromagnetic waves or the reflection and propagation time properties of such waves. Here, high-frequency electromagnetic waves (e.g. microwave pulses) are emitted from the level measuring device in the direction towards the surface of the filling in the container, the high-frequency electromagnetic waves are reflected by this surface, and the calculation is based on the propagation time of the reflected microwave signal material level. With the further development of technology, especially with the development of electronics and semiconductor technology, hig...

Claims

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Application Information

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IPC IPC(8): G01F23/284G01S7/03G01S13/88H05K1/02H01P5/107
CPCG01F23/284G01S7/03G01S13/88H05K1/0237H01P5/107H05K2201/037G01S7/032G01S7/027H01P3/121G01F23/292G01S13/02H05K1/0243H01P3/081H01P7/082H05K1/0242H05K1/115
Inventor 于尔根·莫茨尔温弗里德·劳尔丹尼尔·舒尔特海斯克里斯托弗·米勒
Owner VEGA GRIESHABER GMBH & CO
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