Power loss and local surface impedance associated with conducting rough interfaces

摘要: The increase of the working frequencies electromagnetic wave circuits causes high transmission losses due to roughness metal surfaces. To understand this phenomenon, we model a rough interface in simplest manner, by periodic grooves infinite length. Then reduced two-dimensional problem is analyzed numerically equivalent source method. Two polarizations are treated separately: H-wave case, which directions and current perpendicular, E-wave they parallel. Three cross-sectional shapes surface—rectangular, triangular, semielliptical conductors—are selected for computing power local surface impedances. We observe how shape groove depth affect above characteristics, investigate behavior numerical results physically taking account field distributions. © 2005 Wiley Periodicals, Inc. Electron Comm Jpn Pt 2, 89(1): 1–10, 2006; Published online InterScience (www.interscience.wiley.com). DOI 10.1002/ecjb.20218