Band discriminating method in a receiver
US4709407A · kind A · utility
29Cited by
5References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1985 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | Oct 1, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/145
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A band determining method in which radar signals of first and second frequency bands are received in the upper- and lower-heterodyne reception modes, using a local oscillation signal modulated with a low frequency signal, thus causing the phase relationship between the detected signal and the modulating signal to indicate which band signals are received.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.