Method and apparatus for passive direction finding with sideband determination
US5148180A · kind A · utility
10Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1991 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Jul 15, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/46
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus are provided for passive direction finding that demines the sideband and angle of arrival of an incoming radio signal. A four-channel superheterodyne receiver generates quadrature between the radio signals received by each channel. Four inphase/quadrature phase detectors are connected to the receiver for generating inphase and quadrature components of the electrical phase differences between antenna elements of the receiver. The inphase and quadrature components are used for sideband determination and the electrical phase differences are used to derive the angle of arrival.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.