Patent ID: 7952514
Filing Date: 2011-05-31
Classification: G01S

Abstract:
1. A radar level gauge system using microwaves for measuring a level of a surface of a product in a container, comprising: a microwave unit for transmitting microwaves towards the surface and receiving microwaves reflected by the surface, processing circuitry connected to the microwave unit and arranged to determine the level based on a relation between transmitted and received microwaves, an interface for providing communication and power to the radar level gauge system, and power management circuitry for regulating operating power to be used by the microwave unit and the processing circuitry, wherein the power management circuitry comprises: a DC-DC converter having an input terminal connected to the interface, an output terminal connected to the microwave unit and the processing circuitry, and a reference terminal connected to an electrical reference point, wherein a first voltage level at the input terminal and a second voltage level at the output terminal relates to a reference voltage level at the electrical reference point, and an energy storage capacitor connected between the input and output terminals of the DC-DC converter.