Auto-Calibration and element failure compensation in active phased

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$728,133.00
Award Year:
1995
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
19939
Agency Tracking Number:
19939
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
2950 31st Street, Suite 200, Santa Monica, CA, 90405
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Charles A. Shipley
(310) 450-9755
Business Contact:
() -
Research Institute:
n/a
Abstract
Solid state active phased array antennas promise to provide very low sidelobe capability. However, they will be subject to short term calibration drift and element failures. This compels an on-line, operational self calibration capability. TSC proposes a completely internal, on-line self calibration technique which utilizes the inherent mutual coupling among the radiating elements to accurately measure the transfer coefficients of each of the elements and their associated T/R module receivers and transmitters, transmission lines, and beamformers. The technique does not require knowledge of the absolute magnitude of the mutual coupling coefficients, but exploits the fact that the coupling coefficients will be very consistent across the array, and will remain very stable with time. Once the transfer coefficients are accurately measured, the appropriate corrections are applied to the T/R module phase shifters and attenuators. In case of a failed element, one of several algorithms is applied which optimally adjusts the other elements in the array to recover the antenna pattern sidelobe performance. The simplest of these to implement utilizes adjustments to the weights of the other elements in the array to synthesize, and add back, a close approximation of the missing array element pattern.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government