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Effects of variance in the size of the scatterer on its radar cross section
Author(s) -
Zhendong Shi,
Qing Li
Publication year - 1993
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.4650060510
Subject(s) - radar cross section , wavelength , lossy compression , scale (ratio) , scale factor (cosmology) , radar , cross section (physics) , phase (matter) , variance (accounting) , form factor (electronics) , scale model , radiation , similarity (geometry) , physics , mathematics , optics , mathematical analysis , engineering , computer science , statistics , telecommunications , aerospace engineering , quantum mechanics , accounting , cosmology , artificial intelligence , metric expansion of space , dark energy , business , image (mathematics)
For scale‐model measurement of the RCS of a lossy target, it is difficult to meet all the requirements of physical similarity [1], especially in the constitutive parameters of the absorbent materials because of their frequency dependence. One often avoids this problem by keeping the wavelength of incident radiation fixed with the sizes of the target scaled down. In this case, the scale factor to evaluate the RCS of prototype from that of a scale model must be found. This article gives brief expressions of the RCS and the scale factors for simply shaped scatterers by means of a PO approximation and the method of stationary phase. It is found that the physical scale factor q 2 is not always proportional to the geometrical scale factor p 2 , but to p to the powers of 2‐4 for a variety of shaped scatterers, respectively, provided their characteristic dimensions are much greater than the working wavelength. © 1993 John Wiley & sons, Inc.