The Periodicity of the Scattering Matrix and Its Application

Jian YANG  Ying-Ning PENG  Yoshio YAMAGUCHI  Hiroyoshi YAMADA  Wolfgang-M. BOERNER  

IEICE TRANSACTIONS on Communications   Vol.E85-B   No.2   pp.565-567
Publication Date: 2002/02/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Sensing
radar polarimetry,  scattering matrix,  invariance,  target,  

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The periodicity of a target scattering matrix is studied when the target is rotated about the sight line of a monostatic radar. Except for the periodicity and invariance of the scattering matrix diag(a,a), it is proved that only helixes have the quasi-invariance, and that only N-targets have the quasi-periodicity, demonstrating that a target with some angle rotation symmetry also has the scattering matrix form diag(a,a). From this result, we conclude that it is impossible to extract the shape characteristics of a complex target from its scattering matrix or its Kennaugh matrix.