Analysis of Coupling Effectiveness on Concealed Signal Cable Slot with Different Shapes

It is important to study the shielding effectiveness to reduce the electromagnetic interference and to protect electronic components. Taking the concealed signal cable which is set in shielding shell as the research object. The influence of different slot shapes on shielding effectiveness was analyzed by applying the mixed methods (Quadric FE-BEM). The results show that the coupling capacitance of a trapezoidal slot is the biggest, the one of rectangular slot is medium, and the one of a taper slot is the smallest for shielding pair cable, but their change trend are almost the same. In addition, with the various slot shapes width increasing, shielding pair cable coupling capacitance is little changed. The study is instructive for more effective to defense EMI and will improve the agricultural concealed shielding cable electromagnetic compatibility