Comment on "Electromagnetic coupling between two half-space regions separated by multiple slot-perforate parallel conducting screens"

El-Hajj, Kabalan and Khoury (see ibid., vol.37, p.105, 1995) have analyzed electromagnetic coupling between two half-space regions through multiple slotted parallel conducting screens by the method that they have used to analyze another problem. The main contribution of the above paper is a numerical method instead of a matrix inverse method to directly solve the unknown magnetic current. However, the authors used the wrong Green´s function to compute the admittance matrix element.