Digitally synthesized phase error correcting system
US5003314A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1989 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Jul 24, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/46
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system for correcting phase errors in a space based radar system utilizing probes located in front of an array of lens elements of a phased array antenna. Included is a mechanism for supplying a stored perfect value signal indicative of the distance between the probes and lens elements for a perfect, nondeformed array, and the mechanism for receiving radiated pilot signals to supply an actual value signal indicative of the actual distance between the probes and the lens elements to determine an amount of structural deformation. A mechanism is provided for measuring the difference in phase between the perfect value signal and the actual value signal to supply a deformation phase correction signal to adjust the beam steering command to correct for phase error introduced as a result of the measured structural deformation. Further disclosed is a system and method for effecting phase coherence across the array by utilizing a radiated reference pilot frequency pulse to each lens element. Any difference in phase between the measured reference pilot frequency pulse and a stored value is utilized to command a phase correction at each lens element utilizing a feedback loop for effecting ph…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.