An automated computer controlled electrical materials characterization system in which a material sample is subjected to focused near field polarization controlled microwave electrical energy radiation. Response of the material sample to either of reflected or transmitted/refracted microwave radiation is determined by a microwave energy sensor disposable in a range of physical locations with respect to the sample. Automated and unattended operation of the characterization system by way of disclosed computer software is provided. Computer positioned, lens equipped, microwave antenna horn elements provide source and reception functions for the sample received and discharged microwave radiation. Output signal polarization response from the sample examination is especially considered. The disclosed system is especially suited to characterization of “negative index” electrical materials and has utility with a variety of other materials.