Wideband radar nulling system
US8471761B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 23, 2011 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Oct 23, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/56
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This disclosure describes a radar system that in certain embodiments can, among other features, take into account the phase noise and/or drift of a transmit signal when generating a nulling signal. A receiver of the radar system can produce an IF signal by mixing a received signal with a local oscillator. The receiver can also mix the local oscillator with a transmit signal provided directly by the transmitter to the receiver to produce a control signal. Using the control signal to generate a nulling signal, the receiver can maintain or substantially maintain phase coherence between the nulling signal and the transmit signal. As a result, in certain embodiments, more precise nulling can occur, resulting in greater receiver sensitivity. Improved receiver sensitivity can provide a greater maximum detectable range and/or improved target detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.