Near field to far field DF antenna array calibration technique

A technique is disclosed for calculating the phase and amplitude weighting factors for use with a specific compact antenna range that synthesize an in phase, constant amplitude planar wave front that appears to have been transmitted from the far field. The weighting factors are used to weight RF sig...

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Bibliographic Details
Main Author STRUCKMAN KEITH A
Format Patent
LanguageEnglish
Published 10.10.2006
Subjects
ANALOGOUS ARRANGEMENTS USING OTHER WAVES
ANTENNAS, i.e. RADIO AERIALS
BASIC ELECTRIC ELEMENTS
DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES
ELECTRICITY
LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
RADIO DIRECTION-FINDING
RADIO NAVIGATION
TESTING
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Summary:A technique is disclosed for calculating the phase and amplitude weighting factors for use with a specific compact antenna range that synthesize an in phase, constant amplitude planar wave front that appears to have been transmitted from the far field. The weighting factors are used to weight RF signals after they are received by a full size or scaled radio direction finding array mounted on a platform during testing of the antenna array on the compact antenna range. The weighted received signals accurately replicate the antenna array response in the far field, including electromagnetic glint caused by the platform on which the antennas are mounted, and are stored in complex voltage form as a calibration table for the array.
Bibliography:Application Number: US20030470590