Impedance matched guided wave radar level gauge system
US7636059B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 4, 2008 |
| Grant date | Dec 22, 2009 |
| Priority date | — |
| Expiry date | Jun 14, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/225
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A radar level gauge system, for determining a filling level of a product contained in a tank, the radar level gauge system comprising: a transceiver for generating, transmitting and receiving electromagnetic signals; a probe electrically connected to the transceiver at a probe-transceiver connection and arranged to extend towards and into the product contained in the tank, for guiding a transmitted signal from the transceiver towards a surface of the product, and for returning a surface echo signal resulting from reflection of the transmitted signal at the surface back towards the transceiver; an impedance matching device arranged to extend along a portion of the probe inside the tank, an extension of the impedance matching device, in a direction perpendicular to the probe, decreasing along the portion of the probe with increasing distance from the probe-transceiver connection, to thereby provide impedance matching between an impedance of the probe-transceiver connection and an impedance of the probe; and processing circuitry connected to the transceiver for determining the filling level based on the surface echo signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.