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Abstract

The increasing demand for high speed electronic circuits leads the printed circuit board designers to face more electromagnetic coupling and radiation problems. The guard shield is one of the methods to minimize the electromagnetic coupling between adjacent microstriplines on a high speed printed circuit board. A novel U shaped guard shield is proposed to reduce far end crosstalk and near end crosstalk. This paper analyses the performance of various guard intervening schemes between two signal lines using FDTD method. The numerical results are verified by Ansoft HFSS simulation results. The U shaped guard traces reduces both near end crosstalk and far end crosstalk by approximately 45% than conventional guard traces.