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US 7,605,748 B2Granted
Filling level radar frequency converter
AssigneeVEGA Grieshaber KG
InventorsJosef Fehrenbach, Daniel Schultheiss, Karl Griessbaum
Life of this patent
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Abstract
A frequency converter for a filling level radar includes a signal generator unit, a receiver circuit, a transmit coupler, and an amplifier. The amplifier is amplifying the transmit signal at the high frequency side of the frequency converter. For frequency conversion, a mixer or a multiplier may be provided.
Claims11
A frequency converter for a filling level radar, the frequency converter comprising:
- a signal generator unit for generating a frequency converted electromagnetic transmit signal;
- a receiver circuit for receiving a receive signal for determining a filling level;
- a sampling mixer for retarding the receive signal;
- a transmit coupler;
- and
- a first amplifier for amplifying one of the frequency converted transmit signal and the receive signal;
- wherein the transmit coupler has an input for picking up the amplified frequency converted transmit signal from the signal generator unit, a first output for directly delivering the transmit signal to an antenna device, and for picking up the receive signal from the antenna device, and a second output for delivering the receive signal to the receiver circuit;
- and
- wherein the signal generator unit comprises a first frequency converter unit for converting the frequency of the transmit signal and the receiver circuit comprises a second frequency converter unit for converting one of the one of the receive signal and of a signal generated by a pulse generator.
6 more elements
A filling level radar for determining a filling level in a tank, the filling level radar comprising:
- an antenna for transmitting and/or receiving electromagnetic waves;
- a frequency converter, comprising:
- a signal generator unit for generating a frequency converted electromagnetic transmit signal;
- a receiver circuit for receiving a receive signal for determining a filling level;
- a sampling mixer for retarding the receive signal;
- a transmit coupler;
- and
- a first amplifier for amplifying one of the frequency converted transmit signal and the receive signal;
- wherein the transmit coupler has an input for picking up the amplified frequency converted transmit signal from the signal generator unit, a first output for directly delivering the transmit signal to an antenna device, and for picking up the receive signal from the antenna device, and a second output for delivering the receive signal to the receiver circuit;
- and
- wherein the signal generator unit comprises a first frequency converter unit for converting the frequency of the transmit signal and the receiver circuit comprises a second frequency converter unit for converting one of the frequency of the receive signal and of a signal generated by a pulse generator.
8 more elements
Dependencies are inferred from the claim text.