Method and apparatus for reducing the power of jamming signals received by radar antenna sidelobes
US4672378A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1983 |
| Grant date | Jun 9, 1987 |
| Priority date | — |
| Expiry date | May 20, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/2635
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Secondary lobe cancellation (SLC) is used to reduce the power of jamming signals received by the sidelobes of a main radar antenna. The signal from the radiation pattern of the main antenna is summed with signals from auxiliary radiation patterns. Each auxiliary pattern is chosen to be directional, to have a null or at least a gain minimum in the direction of maximum radiation in the main antenna pattern, to have its phase center close to that of the main antenna pattern, and to have gain minimums in those directions for which the sidelobes of the main antenna pattern are low enough to be insensitive to jamming signals. The various patterns may all be derived from an array antenna, e.g. a multibeam antenna, an aplanatic lens antenna, or a chandelier fed antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.