Homojen Olmayan Düzlem Dalgaların Mükemmel Elektrik İletken (MEİ) Yarım Düzlem Tarafından Saçınımının Asimptotik Olarak Hesaplanması

Bu çalışmada mükemmel elektrik iletken (MEİ) yarım düzlemine eğik olarak gelen homojen olmayan (inhomojen) bir düzlem dalganın yansıyan ve kırınan alanları iki boyutlu durum için asimptotik olarak hesaplanmış ve farklı yönlerden yeniden incelenmiştir. Elde edilen sonuçlar Matlab ile sayısal olarak çizdirilmiştir. Kompleks geliş açısıyla alan yoğunlukları ve alanlardaki faz kaymaları belirlenmiştir. Matlab çizimleri yorumlanmış ve uyumluluk için teoriyle karşılaştırılmıştır.

Anahtar Kelimeler:

Evanesent dalga, İnhomojen dalga, Saçınan alan

ASYMPTOTIC EVALUATION OF SCATTERING OF INHOMOGENEOUS PLANE WAVES BY A PERFECTLY ELECTRIC CONDUCTING HALF PLANE

In the present study, reflected and diffracted fields of an inhomogeneous plane wave obliquely incident on the surface of a perfectly electric conducting (PEC) half plane are evaluated for a two-dimensional case asymptotically and reexamined by considering the different aspects. Obtained results are plotted by Matlab numerically. Relationships between the complex angle of incidence and field intensities, and phase shifts in the fields are noted. Matlab plots are interpreted and compared to the theory for consistence.

Keywords:

Evanescent wave, inhomogeneous wave, scattered field,

PDF

___

[1] Ronchi, L., Russo, V., Di Francia, G. T., and Zaccagnini, C. (1961) Scattering of evanescent waves by cylindrical structures, Optica Acta, , 8, 281-299.
[2] Keller, J.B., and Streifer, W. (1971) Complex rays with an application to Gaussian beams, Journal of Optical Society of America, 61, 40-43.
[3] Choudhary, S., and Felsen, L.B. (1973) Asymptotic theory for inhomogeneous waves, IEEE Transactions on Antennas and Propagation, 21, 827-842.
[4] Wang, D., and Deschamps, G.A. (1974) Application of complex ray tracing to scattering problems, Proceedings of IEEE, 11, 1541-1551.
[5] Shevernev, V. I. (1976) Diffraction of an inhomogeneous plane wave by a half-plane, Radiofizika, 19, 1854-1861.
[6] Felsen, L. B. (1976) Evanescent waves, Journal of Optical Society of America, 66, 751.
[7] Bertoni, H. L., Green, A. C., and Felsen, L. B. (1978) Shadowing of an inhomogeneous plane wave by an edge, Journal of Optical Society of America, 68, 983-989.
[8] Deschamps, G. A., Lee, S. W., Gowan, III, E., and Fontana, T. (1979) Diffraction of an evanescent plane wave by a half plane, Wave Motion, 1, 25.
[9] Kouyoumjian, R. G., Manara, G., Nepa, P., and Taute, B. J. E. (1996) The diffraction of an inhomogeneous plane wave by a wedge, Radio Science, 31, 1387-1397.
[10] Manara, G., Nepa, P., Kouyoumjian, R. G., and Taute, B. J. E. (1998) Diffraction of an inhomogeneous plane wave by an impedance wedge in lossy medium, IEEE Transactions on Antennas and Propagation, 46, 1753-1755.
[11] Kouyoumjian, R. G., Celandroni,T., Manara, G., and Nepa, P. (2007) Inhomogeneous electromagnetic plane wave diffraction by a perfectly electric conducting wedge at oblique incidence, Radio Science, 42, RS003680.
[12] Umul, Y. Z. (2007) Uniform theory for the diffraction of evanescent plane waves, Journal of Optical Society of America A, 24, 2426-2430.
[13] Umul , Y. Z. (2007) Diffraction of homogeneous and inhomogeneous plane waves by a planar junction between perfectly conducting and impedance half-planes, Journal of Optical Society of America A, 24, 1786.
[14] Umul, Y. Z. (2007) Diffraction of evanescent plane waves by a resistive half-plane, Journal of Optical Society of America A, 24, 3226-3232.
[15] Umul, Y. Z. (2008) Scattering of a line source by a cylindrical parabolic impedance surface, Journal of Optical Society of America A, 1652-1659, 25.
[16] Kara, M., (2016) Scattering of a plane wave by a cylindrical parabolic perfectly electric conducting reflector, Optik, 127, 4531–4535, doi: 10.1016/j.ijleo.2016.01.146
[17] Umul, Y.Z. (2013) Scattering of inhomogeneous plane waves by a resistive half-screen, Optics Letters, 38, 5102-5105, doi: 10.1364/OL.38.005102