Sidelobe discriminator
US4266226A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1979 |
| Grant date | May 5, 1981 |
| Priority date | — |
| Expiry date | Sep 12, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/293
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Systems for discriminating between signals on the mainbeam of an antenna and signals on the sidelobes of the antenna are disclosed. In one system, sidelobe discrimination is accomplished by positioning an auxiliary antenna relative to a collecting antenna for receiving signals arriving on the radiation pattern of the auxiliary antenna substantially coincident with the receipt of signals by the collecting antenna on the sidelobes of the collecting antenna; modulating the signals received by the auxiliary antenna to have a predetermined modulation pattern; providing received signals in response to both the signals collected by the collecting antenna and the modulated signals; and detecting the received signals having the predetermined modulation pattern, to thereby discriminate the detected signals as being coincident with the signals arriving on the sidelobes of the collecting antenna, and for providing an identification signal to indicate whether the received signal is coincident with signals arriving on the sidelobes of the collecting antenna. In another system, signals arriving on the sidelobes of a collecting antenna array are modulated in response to modulation signals provided…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.