Patent ID: 7636059

Claim:
A radar level gauge system, for determining a filling level of a product contained in a tank, said radar level gauge system comprising: a transceiver for generating, transmitting and receiving electromagnetic signals; a probe electrically connected to said transceiver at a probe-transceiver connection and arranged to extend towards and into said product contained in the tank, for guiding a transmitted signal from said transceiver towards a surface of said product, and for returning a surface echo signal resulting from reflection of said transmitted signal at said surface back towards said transceiver; an impedance matching device arranged to extend along a portion of the probe inside the tank, an extension of said impedance matching device, in a direction perpendicular to said probe, decreasing along said portion of the probe with increasing distance from the probe-transceiver connection, to thereby provide impedance matching between an impedance of said probe-transceiver connection and an impedance of said probe; and processing circuitry connected to said transceiver for determining said filling level based on said surface echo signal.