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Waveguide coupling, high-frequency module, fill-level radar and use

  • US 9,212,942 B2
  • Filed: 07/03/2013
  • Issued: 12/15/2015
  • Est. Priority Date: 07/04/2012
  • Status: Active Grant
First Claim
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1. A waveguide coupling for coupling an electromagnetic signal from a high-frequency module into a waveguide, comprising:

  • a planar radiator element arranged on a circuit board and configured to emit the signal;

    a housing including a rear wall and a waveguide leading through the rear wall, the waveguide being configured to transmit the emitted signal from a volume defined by a start region of the waveguide along a volume defined by a main region of the waveguide; and

    a dielectric sealing element positioned in the waveguide,wherein the planar radiator element is one of (a) arranged in the start region and (b) arranged immediately upstream from the start region;

    wherein an internal diameter of the start region in a transition region to the main region is the same as an internal diameter of the main region, and becomes larger towards the planar radiator element; and

    wherein the circuit board is attached to the housing, such that it closes the housing,wherein the circuit board, the housing, the waveguide, and the dielectric sealing element form an internal cavity inside the housing, which is sealed off from the environment by the circuit board and the dielectric sealing element in a gas-tight manner.

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