Adaptive array antenna system
US5218359A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 1992 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Jul 28, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An adaptive array antenna having a plurality of antenna elements (1-1 through 1-N), related weight circuits (4-1 through 4-N) for weighting amplitude and phase of receive signal by each antenna element, and a combiner (5) for combining weighed signals, has a plurality of antenna beams at the same time by determining weights of said weight circuits, so that a plurality of receive signals due to multipath transmission are received for obtaining high receive level while avoiding multipath interference. Receive signals are converted to digital form, which is stored in a memory (3) for calculation, in which it is first determined whether a receive signal in each beam direction exists or not, selecting at least one direction beam in which receive signal in that direction beam has less mutual delay time from reference signal in reference direction beam than a predetermined delay time, adjusting phase of all the selected direction beams which have selected receive signal so that receive phase of all the selected direction beams are in phase, and determining weights of said weight circuit so that the antenna has a plurality of direction beams simultaneously for the selected receive signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.