J. of Electromagn. Waves and Appl., Vol. 18, No. 5, 675–690, 2004 A WAVELET-BASED APPROACH FOR DISTURBANCE LINE IDENTIFICATION IN PRINTED CIRCUIT BOARDS A. Kacha, F. Grenez, and P. De Doncker Universit´ e Libre de Bruxelles Elecgen CP 165/51, Av. F. D. Roosevelt 50 B-1050 Bruxelles, Belgium K. Benmahammed D´ epartement d’Electronique Facult´ e des Sciences de l’Ing´ enieur Universit´ e de Setif Setif 19000, Algeria Abstract—The problem of identifying disturbance lines in printed circuitboardsisaddressed. Identificationisachievedbyestimatingthe disturbancefrequencyandtheseparationdistancebetweenthecoupled lines. Frequency estimation uses a wavelet coefficients thresholding method to reconstruct the interference caused by the disturbance line. The separation distance is computed using two empirical laws based on physical ground and verified by simulation. The performance of the proposed method is illustrated by simulation results. 1 Introduction 2 Wavelet Analysis 3 Disturbance Line Identification 3.1 Simulation Geometry 3.2 Frequency Estimation 3.3 Separation Distance Determination 3.3.1 Algorithm 3.3.2 Simulation Example 4 Conclusions References