Comparison of measured and computed local electric field distributions due to vehicle-mounted antennas using 2D feature selective validation

Abstract

This paper outlines the results of a validation study based on simulated and measured data obtained for the electric field in the vicinity of a vehicle equipped with a roof-mounted monopole antenna. Evaluations based on simple statistics and a 2D feature selective validation (FSV) analysis are presented. Statistical differences between the measurements and simulations are found be better than /spl plusmn/3 dB (which is also the estimated uncertainty of the measurements) for more than 83% of the sampling points, depending on the measurement plane. These conclusions are also supported by the 2D FSV analysis. Taking account of measurement uncertainties, results are judged to be "ideal", in terms of the similarities between the amplitudes of the normalized spatial field distributions, and "very good" in terms of the similarities between the shape and locations of features. The study confirms that satisfactory accuracy can be gained in the prediction of field distributions due to vehicle mounted antennas. Using the 2D FSV approach, comparisons between the two antenna configurations are more similar than statistical measures, which are based on amplitude alone, would suggest.