Dual-mode radar receiver
US4568940A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 1981 |
| Grant date | Feb 4, 1986 |
| Priority date | — |
| Expiry date | Dec 22, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus is disclosed which processes sum and difference signals generated from received radar signals to provide target angle information in terms of amplitude or phase. The system includes an IF section and an RF section which processes the sum and difference signals. In the amplitude mode, the sum and difference signals are processed in a conventional manner through a hybrid combiner to an amplitude angle detector which provides the desired target information. A selectively controllable phase shifter is provided as part of the IF section to control the phase of the difference signals provided as output signals therefrom. In the amplitude mode, the phase delay associated with of the signals in the sum and difference channels is matched (zero phase difference between channels) so that amplitude information is processed to generate the target information. In the phase mode, the difference signals are incremented by 90.degree. which generates signals indicative of target phase information. These output signals are processed by a phase angle detector to provide the desired target information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.