Radar calibration structure and method
US7982664B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 2009 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Jan 15, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/267
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A radar system with an array antenna includes various signal paths, including beamformers, extending between an exciter, a receiver, and the array antenna. The signal paths are calibrated by a method that includes frequency modulation of the exciter signals that reach the “antenna” and additional amplitude modulation of signals just as they enter the receiver. Leakage paths directly from the exciter to the receiver are unmodulated, those extending from the exciter through the beamformer are amplitude modulated, and only those reaching the “antenna” and returning to the receiver are both amplitude and frequency modulated. The receiver is tuned to receive only the “doubly-modulated” signals, which tends to reject leakage signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.