All digital apparatus for bearing measurement of electromagnetic sources
US6697017B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 7, 2002 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | May 7, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/043
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device and method for determining the bearing of an incoming RF signal. The signal is received using a plurality of primary antenna element (5). Each antenna element feeds into a respective receiving channel (6) that downconverts the received RF signal to IF, preferably by mixing with a local oscillator signal. The local oscillator signal may be produced by diverting and combining portions of the received RF signals, by receiving the incoming RF signal using one or more auxiliary antennas (11), or by a tunable oscillator. Preferably, the local oscillator signal is conditioned and filtered before mixing. The IF signals are processed, either by analog or digital means, to infer the bearing of the incoming RF signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.