Adaptive array antenna
US6400318B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2000 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Apr 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/2605
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In an adaptive array antenna, the phase-shifted amount of one of a plurality of phase shifters is changed to a value obtained by increasing a currently set phase-shifted amount by a predetermined angle, and then, to a value obtained by decreasing the currently set phase-shifted amount by a predetermined angle. The variation in strength of a received signal combined at this time is detected by a signal strength detector, and a partial differential coefficient of a performance function with respect to the phase-shifted amount is derived using only the detected variation in strength of the received signal. Thus, the phase control based on the partial differential coefficient of the performance function with respect to the phase-shifted amount is carried out with a simple circuit construction without the need of signals of each antenna element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.