Antenna array system with directional couplers for calibration
US11736209B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2022 |
| Grant date | Aug 22, 2023 |
| Priority date | — |
| Expiry date | Apr 7, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/12
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna array system includes a receiver with a plurality of receiving chains adapted to receive incoming signals from corresponding receiver antennas. A respective directional coupler is positioned in proximity to each of the plurality of receiving chains. The plurality of receiving chains is adapted to receive a respective pilot signal through the respective directional coupler, the respective pilot signal being transmitted simultaneously. A controller has a processor and tangible, non-transitory memory on which instructions are recorded for a method of calibration. One of the plurality of receiving chains is selected as a reference channel. The controller is adapted to perform calibration for the plurality of receiving chains based on the respective pilot signal, including obtaining respective chain phase values and respective gain factors. The calibration is performed without mechanical switching off or physically disconnecting the corresponding receiver antennas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.