Title :
The correction of near-field RCS of canonical shape calibrators
Author :
Li, Li ; Cai, Honghao ; Liang, Zichang ; Yue, Hui ; Wu, Yajun
Author_Institution :
Sci. & Technol. on Electromagn. Scattering Lab., Shanghai, China
Abstract :
As we know, it´s very difficult to describe clearly the near-field scattering characteristic, as its scattering condition in near-filed, namely, the spherical-wave illumination and non-uniform irradiation, is strictly relative to the distance. Also when carry out the measurement, it is necessary to get the related information of the calibrator. In this paper, basing on the surface reflection algorithm and edge diffraction equivalence theory, we derived equivalent correctional equations of the near-field RCS canonical calibration bodies. In the final, we compared the calculation results with the measurement´s, which agree well with each other and shows that the conclusion can be used for the future work to effectively reduce the calibration error.
Keywords :
calibration; radar cross-sections; calibration error; canonical shape calibrator; edge diffraction equivalence theory; equivalent correctional equation; near field RCS canonical calibration body; near field scattering characteristic; nonuniform irradiation; scattering condition; spherical wave illumination; surface reflection algorithm; Approximation methods; Calibration; Diffraction; Electromagnetic scattering; Equations; Lighting; Mathematical model; Calibrator; Metal Plate; Near-Field Correction; Perfectly-conducting Sphere; Radar Cross Section;
Conference_Titel :
Millimeter Waves (GSMM), 2012 5th Global Symposium on
Conference_Location :
Harbin
Print_ISBN :
978-1-4673-1302-5
DOI :
10.1109/GSMM.2012.6314079