Effects of Surface Roughness on Lossy Rectangular Waveguide
Keywords:
Gaussian random process, integral equation, rectangular waveguide, rough surface, surface-impedance boundaryAbstract
The integral equation method combined with the surface-impedance boundary condition is applied for the analysis of propagation characteristics of rough lossy metal waveguides. The surface roughness of waveguide is random, and the statistical properties associated to the wall roughness are consistent with a Gaussian random process. The effects of the waveguide parameters on the propagation constant and attenuation constant are discussed rigorously, including the frequency, the standard deviation of height and correlation length of the Gaussian roughness. The results show that, as the increases of correlation length and frequency, the propagation constant is increased and the attenuation constant is decreased; while as the increase of the standard deviation, the trends of the propagation constant and the attenuation constant are just opposite.
Downloads
References
C. D. Chen, C. K. C. Tzuang, and S. T. Peng, “Full-Wave Analysis of a Lossy Rectangular Waveguide Containing Rough Inner Surfaces,” IEEE Microwave Guided Wave Lett., vol. 2, pp. 0- 181, 1999.
S. K. Popalghat, A. Chaudhari, and P. B. Patil, “Effect of Surface Roughness on Electromagnetic Propagation through Waveguides,” Indian Journal of pure& Applied Physics, vol. 37, pp. 48-852, 1999.
A. M. Sua´rez, R. E. Luna, J. C. Mandujano, and J. E. Luna, “Numerical Technique to Calculate Modes in Waveguides of Arbitrarily CrossSectional Shape,” J. Opt. Soc. Am. A, vol. 18, pp. 961-965, 2001.
G. A. Rubioa, A. M. Sua´rez, R.E. Lunaa, and E. T. Herna´ndezb, “Application of a New Numerical Method to Calculate TE Modes in Hollow-Conducting Waveguides,” Optical Communications, vol. 221, pp. 301–306, 2003.
A. M. Sua´rez, U. R. Corona, and R. E. Luna, “Effects of Wall Random Roughness on TE and TM Modes in a Hollow Conducting Waveguide,” Optical Communications, vol. 238, pp. 291–299, 2004.
Y. J. Zhao, K. L. Wu, and K. K. M. Cheng, “A Compact 2-D Full-Wave Finite-Difference Frequency-Domain Method for General Guided Wave Structures,” IEEE Trans. Microwave Theory Tech., vol. 50, pp. 1844–1848, 2002.
J. Li, L. X. Guo, and H. Zeng, “FDTD Investigation on Electromagnetic Scattering from Two-Dimensional Layered Rough Surfaces,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 25, pp. 450–457, May 2010.
L. D. Rienzo, N. Ida, and S. Yuferev, “Surface Impedance Boundary Conditions of High Order of Approximation for the Finite Integration Technique,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 22, pp. 53–59, Mar. 2007.
B. Z. Wang, X. HW, and W. Shao, “2D FullWave Finite-Difference Frequency-Domain Method for Lossy Metal Waveguide,” Microw. Opt. Tech.. lett., vol. 42, pp. 158-161, 2004.
W. H. Press, S. A. Teukolsky, W. T. Vetterling, and B. P. Flannery, Numerical Recipes in FORTRAN, Cambridge University Press, Cambridge, UK, 1992.
