Abstract: A waveguide arrangement for guiding electromagnetic waves in a cavity surrounded by conductive material is proposed, wherein the waveguide arrangement comprises a printed circuit board material having an electrically conductive, plate-shaped back, a substrate and a conductive layer arranged on a side of the substrate facing away from the back. According to the invention, it is provided that the back has a surface structure, preferably formed by at least one recess, by which the waveguiding cavity is at least partially directly bounded; and/or that the cavity is formed in split-block technology by joining the printed circuit board material as split-block bottom part with a corresponding cover as split-block top part.

Abstract: The present invention relates to a reference oscillator arrangement comprising a first reference oscillator for generating a first output signal and a second reference oscillator for generating a second output signal, wherein the reference oscillator arrangement comprises a phase locked loop for controlling the frequency and/or phase of the second reference oscillator to the frequency and/or phase of the first reference oscillator.

Abstract: The present invention relates to a frequency generator arrangement having an oscillator for generating an oscillator signal having an oscillator frequency and an oscillator output for outputting the oscillator signal, the frequency generator arrangement further comprising a frequency multiplier coupled and/or connected to an oscillator output for generating an output signal of the frequency generator arrangement having a multiplier frequency corresponding to a multiple of the oscillator frequency, wherein the frequency multiplier comprises a frequency multiplier core directly causative of the frequency multiplication, the frequency multiplier core having a power supply, and the frequency generator arrangement having a control input for controlling the power supply to the frequency multiplier core, whereby an output power of the output signal is adjustable by controlling the power supply to the frequency multiplier core.

Abstract: A method and device for determining a velocity of a flowing medium that allows an as high as possible measuring accuracy without requiring a complicated measuring construction is achieved in that a vortex is generated in the medium and an electromagnetic signal is emitted into the medium. Then, the permittivity of the medium is determined and the velocity of the medium is determined using the permittivity measurement.

Abstract: A microwave module 1 for a fill level measuring device 2 operating with the runtime method, has a chip for generating and/or receiving microwave signals and a carrier element. To provide an advantageous as possible microwave module, the chip is located in a cavity 9 of the carrier element 8.

Abstract: A method and device for determining a velocity of a flowing medium that allows an as high as possible measuring accuracy without requiring a complicated measuring construction is achieved in that a vortex is generated in the medium and an electromagnetic signal is emitted into the medium. Then, the permittivity of the medium is determined and the velocity of the medium is determined using the permittivity measurement.

Abstract: A microwave module 1 for a fill level measuring device 2 operating with the runtime method, has a chip for generating and/or receiving microwave signals and a carrier element. To provide an advantageous as possible microwave module, the chip is located in a cavity 9 of the carrier element 8.