Near-Field to Far-Field Transformation for an Outdoor RCS Range

Yoshio INASAWA; Shinji KURODA; Ken-ichi KAKIZAKI; Hitoshi NISHIKAWA; Naofumi YONEDA; Shigeru MAKINO

doi:10.1093/ietele/e91-c.9.1463

Regular Section

Near-Field to Far-Field Transformation for an Outdoor RCS Range

Yoshio INASAWA, Shinji KURODA, Ken-ichi KAKIZAKI, Hitoshi NISHIKAWA, Naofumi YONEDA, Shigeru MAKINO

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Keywords: radar cross section, near-field measurement, ground bounce, RCS prediction, near-field to far-field transformation

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2008 Volume E91.C Issue 9 Pages 1463-1471

DOI https://doi.org/10.1093/ietele/e91-c.9.1463

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Abstract

This paper presents the near-field to far-field transformation for an outdoor radar cross section (RCS) range. Direct measurement of the large actual target requires quite a long measurement range. The near-field to far-field RCS transformation method achieves the reduction of measurement range. However the non-uniformity of the incident electric field distribution on the target causes some errors in RCS prediction. We propose a novel near-field to far-field RCS transformation method that can be applied to an outdoor RCS measurement. The non-uniformity of the incident electric field distribution is successfully resolved by introducing the correction term of the ground bounce. We investigate the validity of the proposed method by the simulation and measurement.

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