Apparatus for detecting direction of target using difference in phase of radio wave signals received through plural channels
US7088286B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2003 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Nov 21, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/867
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for detecting a direction of a target is provided. The apparatus transmits and receives radio waves through a plurality of transmission/reception channels causing a phase difference in signals to be received through the transmission/reception channels and calculates the direction based on the phase difference. The apparatus comprises a direction calculating device, range determining device, and direction correcting device. The direction calculating device calculates the direction of the target based on the phase difference in the received signals on the assumption that the phase difference is within a range of −π to +π [rad]. The range determining device determines that the target exists in any of azimuthal angle ranges each corresponding to ranges defined by (2m−1) π to (2m+1) π [rad] (m is an integer). The direction correcting device corrects the direction according to a range-determined result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.