Experimental analysis for electromagnetic scattering characteristics of aluminum-doped zinc oxide (AZO) coated glass

Aluminum-doped zinc oxide (AZO) coated glasses with different sheet resistances were made by unbalanced magnetron sputtering technology. Radar cross section (RCS) of the glasses and the reference metal plate were measured in microwave anechoic chamber in horizontal-horizontal (HH) and vertical-vertical (VV) polarization and 10 GHz and 15 GHz incident wave. The relative reflectivity was proposed to analyze electromagnetic scattering of AZO coated glass. Based on RCS test results, the relationship of relative reflectivity, sheet resistance and optical transmittance was studied. It is shown that proper choice of sheet resistance of AZO coated glass can satisfy both optical admittance and relative reflectivity performance. The optical admittance can be greater than 77% while relative reflectivity is greater than 30%.