Distribution of the Received Voltage's Phases in the Cross-Polarized Channel Case

Jian YANG  Yingning PENG  Yoshio YAMAGUCHI  Wolfgang-Martin BOERNER  

IEICE TRANSACTIONS on Communications   Vol.E85-B   No.6   pp.1223-1226
Publication Date: 2002/06/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Sensing
radar polarimetry,  polarization,  scattering matrix,  phase,  remote sensing,  

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The concept of the equi-phase curve is introduced for the cross-polarized channel case. It is proved that the equi-phase curves are a series of half circles on the Poincare sphere, and that all these curves have two common ends. Based on the introduced concept, this letter demonstrates the distribution of the received voltage's phases on the Poincare sphere. In addition, it is shown theoretically that the cross-polarized phase of the off-diagonal elements of a scattering matrix is unstable for most natural targets. Therefore, the cross-polarized phase information cannot be used for extracting target characteristics in polarimetric radar remote sensing.