Patent ID: 11920970
Assignee: ROSEMOUNT TANK RADAR AB
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 5:
6. A radar level gauge system for determining a filling level of a product in a tank having a tank wall, and a tank atmosphere above a surface of a product in the tank, wherein the radar level gauge system comprises:
a transceiver;
an antenna arrangement coupled to the transceiver and configured to transmit an electromagnetic first transmit signal generated by the transceiver through the tank atmosphere towards a corner reflector formed by the surface of the product and the tank wall where the surface of the product meets the tank wall, the corner reflector being at a known horizontal distance from the radar level gauge system, and receive and return to the transceiver an electromagnetic first reflection signal resulting from reflection of the first transmit signal at the corner reflector; and
processing circuitry coupled to the transceiver and configured to:
determine a measure indicative of a propagation direction of the first reflection signal; and
determine the filling level based on the measure indicative of the propagation direction of the first reflection signal and the known horizontal distance between the radar level gauge system and the corner reflector.