2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/198088A method for calculating coupling impedances and power losses for off-axis beams is developed. It is applied to calculate impedances of small localized discontinuities like holes and slots, as well as the impedance due to a finite resistivity of chamber walls, in homogeneous chambers with an arbitrary shape of the chamber cross section. The approach requires to solve a two-dimensional electrostatic problem, which can be easily done numerically in the general case, while for some particular cases analytical solutions are obtained.11 pages, LaTeX2e, 4 figures (eps) included. Presented at EPAC96 (Barcelona, Spain, June 1996)Accelerator Physicstext