SUSCEPTIBILITY ANALYSIS OF ARBITRARILY-SHAPED 2-D SLOTTED SCREENS USING A HYBRID GENERALIZED SCATTERING MATRIX FINITE-ELEMENT TECHNIQUE

The electromagnetic susceptibility (EMS) inside slotted screens has be en studied using a hybrid technique, The screen is characterized by a generalized admittance or impedance matrix, computed using the finite element method (FEM), which is then combined with a modal solution in free-space, The scattering matrix for the screen can then be easily co mputed, As a practical application, the electrical performance of a sl otted square envelope has been studied, In general, it is shown that c oupling to the interior of slotted screens is maximized at frequencies corresponding to resonances of the shorted screen, provided that the fields do not vanish near the aperture.