Extendable/retractable antenna calibration element
US7215298B1 · kind B1 · utility
17Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2005 |
| Grant date | May 8, 2007 |
| Priority date | — |
| Expiry date | Sep 6, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/061
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna array coacts with a ground plane for radiation. Calibration of the array is accomplished with the aid of one or more extensible calibration antenna elements, such as monopole antenna elements. Each calibration monopole is ordinarily retracted below the ground plane and is not “energized.” When calibration is desired, it is extended to protrude above the ground plane so as to achieve mutual coupling with one or more of the elements of the array antenna. Calibration signals may be passed in either direction. The calibration antenna may be extended/retracted by vacuum, mechanical device, or electrical motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.