The apertures or slots on shielding enclosure are the main factor to influence the shielding performance.The simulation for thin slots in the electromagnetic shielding analysis has been a bottle-neck.Subcellular models of thin slots in the finite-difference time-domain(FDTD) method are investigated.A 3D thin-slot algorithm based on contour path(CP) method is presented for the application to shielding enclosure.The accuracy and the applicability to the slot width are validated with finer mesh model or capacitive thin-slot formalism(C-TSF) for slot models with different width.
