Truncation-Error Reduction in 2D Cylindrical/Spherical Near-Field Measurements
Final rept. 1 Oct 2008-30 Sep 2009
AIR FORCE RESEARCH LAB HANSCOM AFB MA SENSORS DIR/ELECTROMAGNETICS TECHNOLOGY DIV
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We introduce a near-field to far-field transformation for two-dimensional cylindricalspherical scanning that significantly reduces angular-truncation errors. After examining the limitations of the traditional multipole-based expansion of truncated scan data, we consider an alternative expansion based on Slepian functions and show how far-field values can be extracted from the resulting expansion coefficients. We compare the performance and computational cost of the new transformation with those of the traditional one.
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