Patent ID: 8736486
Filing Date: 2014-05-27
Classification: A61B

Abstract:
1. A method for calibrating a near field synthetic aperture radar system, the method comprising the steps of: positioning at least one antenna adjacent an object to be scanned in a near field relationship; scanning a reflecting material using the at least one antenna at a plurality of antenna locations to create a scanning profile, the scanning profile being created from a reflected wave having a local non-planar wave front when received at the at least one antenna; scanning an absorbing material using the at least one antenna at a plurality of antenna locations to create an absorbing profile, the absorbing profile being created from a reflected wave having a generally local non-planar wave front when received at the at least one antenna; and creating a calibrated profile using the scanning profile and the absorbing profile, the calibrated profile including an error model that describes at least the effects caused by distortion of a radiation pattern of the at least one antenna for the plurality of antenna locations in a near field relationship with an object to be scanned, the error model being based on the scanning profile and the absorbing profile.