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Circuit board for radar level measuring device with waveguide coupling

A level measurement, circuit board technology, applied in measurement devices, radio wave measurement systems, waveguides, etc.

Active Publication Date: 2022-06-07
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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  • Circuit board for radar level measuring device with waveguide coupling
  • Circuit board for radar level measuring device with waveguide coupling
  • Circuit board for radar level measuring device with waveguide coupling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] figure 1 A partial area of ​​the circuit board 10 for coupling the waveguide 14 is shown. Microwave conductors 16 are arranged on the circuit board substrate 12 . In the example shown here, the microwave conductors 16 extend over the surface of the circuit board substrate 12 , here the microwave conductors 16 extend over the front side 18 . According to one example (not shown here), the microwave conductors 16 are arranged inside the circuit board substrate 12 . The advantage is that with figure 1 Contrary to what is shown, the waveguide 14 does not need to be additionally separated or shortened at this location for insulation purposes, but rather the waveguide 14 has a circumferential planar or flat end face which has the advantage of being simple to manufacture (eg cutting ).

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

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PUM

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Abstract

The invention relates to a circuit board (10) with a circuit board substrate (12) for a radar level measuring device, wherein a microwave signal is coupled into a waveguide (14) via a microwave conductor (16). A connection area (22) at the front side (18) of the circuit board substrate (12) is used to accommodate the waveguide (14). The shape of the resonator basin is reversed by making an annular circumferential groove (30) at the rear side (28) of the circuit board substrate (12), wherein the walls of the groove (30) have an electromagnetically reflective coating (32) . The groove (30) together with the region (34) surrounded by the groove at the rear side (28) forms a resonator for the coupled microwave signal.

Description

technical field [0001] The present invention relates to, for example, the measurement of the level in a container. In particular, the invention relates to a circuit board for a microwave-based or radar-based level measurement device with microwave coupling means in a waveguide. Background technique [0002] Known filling level measuring devices increasingly use the principle of determining the filling level by means of the propagation of electromagnetic waves or the reflection properties and propagation time properties of such waves. Here, high-frequency electromagnetic waves (eg 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 the surface, and are calculated from the travel time of the reflected microwave signals material level. With the further development of technology, especially with the development of electronics and semiconduct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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