EFFECT OF SEGMENTATION OF CONDUCTIVE COATINGS ON THE RADIO-WAVE REFLECTION FROM SOLAR CONTROL SHEET GLASS

Solar control glass often becomes an obstacle to television broadcast wave reception inside a room, because coated conductive films can refl ect incident electromagnetic waves with frequencies lower than that of the plasma oscillation of the films. Results of calculation of reflec tion coefficients from theoretical equations showed that the radio wav e reflection from solar control glass decreases by dividing the conduc tive film into discontinuous segments with a periodic array, The segme ntal effect has been examined experimentally, Experimental results for the system of periodic conductive segments fixed on soda lime silicat e glass agreed very well with the theoretical results when the edge ef fect of the array was very small, It was found also the power reflecti on coefficients for aluminium foil segments of 25 mm square were less than 0.05 below 200 MHz.