Yagi directional antenna models for outside broadcast radio transmitters that operate at a frequency of 470 MHz has not been widely used because it is expensive and difficult to get. Strengthening and good reach an absolute requirement for quality Yagi directional antenna models . Diameter of materials , the number of directional , distance elements, conductivity material , corner reflector are factors that affect the quality of the model Yagi directional antenna . Taguchi method one of the methods that are used to create an optimization strengthening and range of directional antennas yagi models . Optimal combination of factors that makes the Taguchi method can be achieved with Orthogonal Array L27 . The results of calculations by a factor Anova Diameter materials , spacing elements and the conductivity of the material becomes a major factor affecting the increase and strengthening of the range models Yagi directional antennas . Results of the model proposed making an antenna directional yagi with Multi calculation Response Signal to Noise ( MRSN ) generated Optimal setting for strengthening and range that is A1B1C1D1E2F3 . With the composition of material diameter of 5 mm , a directional number 10 pieces , 5 pieces of reflector number , spacing elements 8 cm , the conductivity of aluminum and corner reflector 90 . The experimental results based on the proposed MRSN generated by 13,55 dB strengthening and range of 2,94 Km . The price of making an antenna directional Yagi models based on the proposed MRSN which is worth Rp.140.000 , ­
Keywords : model of Yagi Antenna Steering , Radio Transmitters , Frequency 470Mhz , strengthening , range , Taguchi