Relationship between formulation constituents and signature characteristics was studied in the title propellant,containing polyether,nitrate ester and RDX. Theoretical result showed that the total content of Al₂O₃ and HCl in the combustion gas could be up to 87 percent lower than common HTPB propellant, when the content of AP and Al was controlled lower than 10% and 2% respectively. Microwave attenuation at 2 cm and 5 cm wavelength was measured for diverse formulations,the content of Al changing from 1% to 13%.