Beamformer with reduced sampling rate
US4290127A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1979 |
| Grant date | Sep 15, 1981 |
| Priority date | — |
| Expiry date | Dec 3, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/42
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A beamformer for an array of sonar transducers, or electromagnetic radiating elements, includes mixers for translating the signals received by the transducers to a lower frequency. The beamformer incorporates delay lines operating at a clock rate which is reduced in proportion to the decrease in frequency. Each delay line provides delays to the signals of corresponding ones of the transducers in accordance with the time of arrival of a wavefront of radiation upon the respective transducers. Phase shifters coupled between the mixers and the delay lines impart phase shifts to the transducer signals proportional to the respective delays to compensate for the lowering of the frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.