Electronically scanning direction finding antenna system
US6987489B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2004 |
| Grant date | Jan 17, 2006 |
| Priority date | — |
| Expiry date | May 4, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q19/17
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic scanning radio direction finding system for accurate direction finding of radio frequency signals using singly or doubly flared cylindrical reflectors surrounded by a circular array of inwardly facing feed horns. The array is operated as a phased array to determine the direction of origin of received signals. The feed horns can also be used to transmit RF signals on very narrowly controlled beams with minimal side lobes. The flared cylindrical reflector and its circular feed horn array may be paired with circular log periodic arrays operable at similar frequency ranges or different frequency ranges to provide more precise direction finding and direction finding of signals at frequencies beyond the range of the flared cylindrical reflector and its circular feed horn array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.