Fill level sensor for detecting a fill level of a fill medium in a container
US11841260B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jan 15, 2021 |
| Grant date | Dec 12, 2023 |
| Priority date | — |
| Expiry date | Dec 16, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q13/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fill level sensor for detecting a level of a fill medium in a container includes a generator having a feed line, an antenna, a supply and a controller. The generator generates electromagnetic waves having a resonant frequency and outputs the electromagnetic waves via the feed line having a line impedance with a line impedance value. The supply is arranged between the feed line and the antenna and transmits the electromagnetic waves from the feed line to the antenna. The supply has a resonant circuit. The resonant circuit and the antenna together have a resonant input impedance in the transmission direction. The resonant circuit transforms the resonant input impedance at the resonant frequency into a real impedance having a predetermined resonant impedance value. The antenna has an antenna resonant frequency different from the resonant frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.