Computing second‐order scattering of obtuse dihedral for any incident angle. Issue 19 (5th July 2019)

• Record Type: Journal Article
• Authors: Song, Haibo; Wen, Gongjian
• Is Part Of: Journal of engineering. Volume 2019:Issue 19(2019)
• Page Start: 6272
• Page End: 6277
• Publication Date: 2019-07-05
• Subjects: geometrical optics -- radar cross‐sections -- electromagnetic wave scattering -- physical optics -- plates (structures); obtuse dihedral -- second‐order scattering area -- plates -- physical optics integral formula -- geometrical optics -- bouncing rays; Engineering -- Periodicals; Engineering; Electronic journals; Periodicals; 620.005
• DOI: 10.1049/joe.2019.0164
• Languages: English
• ISSNs: 2051-3305

Abstract

Abstract : In this study, the second‐order scattering area and field of obtuse dihedral is derived in detail. The obtuse angle, interior angle of dihedral, breaks the symmetry of the two plates in some extent, thus making the illumination case of double bounce more complex. To overcome that, the two plates are analysed here, respectively. Besides, the all cases of second‐order scattering area are considered. Firstly, geometrical optics is utilised to analyse the illuminated cases for each plate and the corresponding range of the incident angle is listed. Then, according to the physical optics integral formula, the integral terms of both plates are derived. To validate the derived model, the experiments compared with shooting and bouncing rays under different illuminated cases have been done.