Adaptive electronically steerable phased array
US4189733A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 1978 |
| Grant date | Feb 19, 1980 |
| Priority date | — |
| Expiry date | Dec 8, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/2617
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An adaptive antenna system which enhances the desired signal in the output of the system while reducing the interference from signals arriving from directions other than that of the desired signal. The antenna system operates in conjunction with a modulation/demodulation system for spreading and despreading the spectrum of the desired signal. By a series of deterministic perturbations of phase shifters or other signal varying devices attached to the antenna elements, the system measures the effects of these perturbations: (1) on the wide-band energy in the output of the antenna, prior to spectrum despreading, and (2) on the narrow-band energy following despreading, and then adjusts the phase shifters or other signal varying devices so as to enhance the desired signal while reducing the interfering signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.