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

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

Publication
IEICE TRANSACTIONS on Electronics   Vol.E91-C   No.9   pp.1463-1471
Publication Date: 2008/09/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e91-c.9.1463
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electromagnetic Theory
Keyword: 
radar cross section,  near-field measurement,  ground bounce,  RCS prediction,  near-field to far-field transformation,  

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Summary: 
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.