Reference pulse generation
AssigneeVEGA Grieshaber KG
InventorsJosef Fehrenbach, Daniel Schultheiss, Christoph Mueller, Karl Griessbaum
Life of this patent
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Abstract
The shape or amplitude of reference pulses in a filling level radar typically depend on the component quality of the circulator used, of a transmitting/receiving coupler, or else of the circuit temperature. In case of large echoes at close range, the quality of the measurement may deteriorate. A radar module for extracting a reference signal for a filling level radar comprises a tap extracting the reference signal and a delay line delaying the transmit signal. Delaying the transmit signal on its way to the antenna takes place after the extraction of the leakage pulse.
Claims20
A high frequency module for extracting a reference signal for a level measuring instrument, comprising:
- a first transmission link transmitting a electromagnetic transmit signal from a source to an antenna or a probe;
- a tap extracting a reference signal from the transmission link;
- and
- a time-delay delaying the transmit signal on its way to the antenna or probe;
- wherein the time-delay is arranged after the tap.
A method for extracting a reference signal for a level measuring instrument, comprising the steps of:
- transmitting an electromagnetic transmit signal via a transmission link from a source to a probe or an antenna;
- extracting a reference signal from the transmission link;
- and
- delaying the transmit signal on its way to the probe or antenna;
- wherein the delay of the transmit signal takes place after the extraction of the reference signal.
Dependencies are inferred from the claim text.