摘要The hybrid finite element method (FEM) together with the boundary integral equation (BIE) is firstly applied to scattering from a conducting rough surface. The BIE is used as the truncation boundary condition for the special unbounded half space, whereas the FEM is used to solve the governing equation in the region surrounded by a rough surface and artificial boundary. Tapered wave incidence is employed to cancel the so-called "edge effect". A hybrid FEM/BIE formulation for generalized one-dimensional conducting rough surface scattering is presented, as well as examples that evaluate its validity compared to the method of moments. The bistatic scattering coefficients of a Gaussian rough surface are calculated for transverse-magnetic wave incidence. Conclusions are reached after analyzing the scattering patterns of rough surfaces with different rms heights and correlation lengths
Abstract：The hybrid finite element method (FEM) together with the boundary integral equation (BIE) is firstly applied to scattering from a conducting rough surface. The BIE is used as the truncation boundary condition for the special unbounded half space, whereas the FEM is used to solve the governing equation in the region surrounded by a rough surface and artificial boundary. Tapered wave incidence is employed to cancel the so-called "edge effect". A hybrid FEM/BIE formulation for generalized one-dimensional conducting rough surface scattering is presented, as well as examples that evaluate its validity compared to the method of moments. The bistatic scattering coefficients of a Gaussian rough surface are calculated for transverse-magnetic wave incidence. Conclusions are reached after analyzing the scattering patterns of rough surfaces with different rms heights and correlation lengths
[1] Lin Z W, Xu X, Zhang X J and Fang G Y 2011 Chin. Phys. Lett. 28 014101
[2] Wang Y H, Zhang Y M and Guo L X 2010 Chin. Phys. Lett. 27 104101
[3] Tsang L, Kong J A, Ding K H and Ao C O 2001 Scattering of Electromagnetic Wave, Numerical Simulations (New York: Wiley)
[4] Lin Z W, Xu X, Zhang X J and Fang G Y 2011 Chin. Phys. Lett. 28 014102
[5] Wang R, Guo L X, Wang A Q and Wu Z S 2011 Chin. Phys. Lett. 28 034101
[6] Xie T, He C, William P, Kuang H L, Zou G H and Chen W 2010 Chin. Phys. B 19 024101
[7] Ma J, Guo L X and Wang A Q 2009 Chin. Phys. B 18 3431
[8] Lentz R R 1974 Radio Sci. 9 1139
[9] Fung A K and Chen M F 1985 J. Opt. Soc. Am. A 2 2274
[10] Maystre D 1983 IEEE Trans. Antennas Propagat. 31 885
[11] Chan C H, Lou S H, Tsang L and Kong J A 1991 Microwave Opt. Technol. Lett. 4 355
[12] Hastings F D, Schneider J B and Broschat S L 1995 IEEE Trans. Antennas Propagat. 43 1183
[13] Kuang L and Jin Y Q 2007 IEEE Trans. Antennas Propagat. 55 2302
[14] LI J, Guo L X and Zeng H 2009 Chin. Phys. Lett. 26 034101
[15] Jin J M 1993 The Finite Element Method in Electromagnetics (New York: Wiley)
[16] Lou S H, Tsang L and Chan C H 1991 Waves in Random Media 1 287
[17] Lou S H, Tsang L, Chan C H and Ishimaru A 1991 J. Electromagnet. Waves Appl. 5 835
[18] Liu P and Jin Y 2004 IEEE Trans. Antennas Propagat. 52 1205
[19] Balanis C A 1989 Advanced Engineering Electromagnetics (New York: Wiley)
[20] Peterson A F 1991 Proc. IEEE 79 1431
[21] Jin J M and Liepa V V 1988 IEEE Trans. Antennas Propagat. 36 1486
2011, Vol. 28 
