Microwave absorbing materials (MAM) based on Conductive composites of Polyaniline in polyurethane (PANI-PU) matrix have been developed to attenuate electromagnetic radiation at microwave frequencies. Their conductivity, capacitance and permittivity were measured. Microwave attenuation observed in all PANI-PU coated aluminium plates was broadband with 2 maxima of power loss measured by HP vector network analyser. Multi-layer coating showed total power loss of 99.94 % in X and 99.2% Ku band
