4-component 2-D CFDFD method in analysis of lossy circular waveguide with fractal rough surface

• Published in: Journal of Shanghai University Vol. 15; no. 3; pp. 185 - 189
• Main Author: 邓宏伟 赵永久 刘冰 姜万顺 宁曰民
• Format: Journal Article
• Language: English
• Published: Heidelberg Shanghai University Press 01.06.2011; College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016,P. R. China%The 41th Research Institute of China Electronics Technology Group Corporation, Qingdao 233006, P. R. China
• Subjects: Attenuation; Circular waveguides; Classical Mechanics; Engineering; Environment; Equivalence; Fractal analysis; Fractals; Information Technology; Life Sciences; Materials Science; Mathematical analysis; Mathematical and Computational Engineering; Mechatronics; Wave propagation; 传播特性; 分形参数; 圆形波导; 圆波导; 粗糙表面; 组件; 衰减常数; 阻抗边界条件; fractal; equivalent surface impedance boundary condition (ESIBC); 2-D compact fimte difference frequency domain (2-D CFDFD); roughness; attenuation constant
• ISSN: 1007-6417; 1863-236X
• DOI: 10.1007/s11741-011-0718-3

In this paper, equivalent surface impedance boundary condition （ESIBC）, which takes fractal parameters （D, G） into SIBC, is implemented in the 4-component 2-D compact finite difference frequency domain （2-D CFDFD） method to an- alyze the propagation characteristics of lossy circular waveguide with fractal rough surface based on Weierstrass-Mandelbrot （W-M） function. Fractal parameters’ effects on attenuation constant are presented in the 3 mm lossy circular waveguide, and the attenuation constants of the first three modes vary monotonically with scaling constant （G） and decrease as the fractal dimension （D） increasing.