Method and apparatus for direction finding
US6223123A · kind A · utility
7Cited by
12References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1998 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Aug 21, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Two pairs of signals determinative of bearing to a transmitter are developed from two pairs of directional antennas. The signals, converted to digital form, are compared to each other to develop a result signal. The result signal is used to select a primary pair out of the original two pair of signals. The non-primary pair of signals are compared to each other to develop a binary sign bit. The primary signal pair, the result signal and the sign signal are applied to a table to develop a bearing quantity related to the bearing to the transmitter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.