Design of Log Periodic Dipole Array Antenna Using One Side with Compare Two Dielectric Material Results

In this paper, design log periodic dipole array antenna using one side with two dielectric material is proposed. The proposed antenna has the capability of operating between 3 GHz to 13 GHz .This antenna is design using two dielectric material such as duroid and FR4_epoxy and compare result of two dielectric material antenna and select best antenna result. The antenna is printed on dielectric substrate of dimensions 400 mm X 100 mm X 1.5 mm. the log periodic dipole array shape is connected the inner conductor of the coaxial connector extends through the dielectric and is soldered to the radiating patch, while the outer conductor is connected to the ground plane using coaxial feed. This log periodic dipole array antenna is design using scale factor τ = 0.850 and spacing factor Sk = 0.150 and apex angle α =140 .This antenna is simulated using ANSOFT HFSS13.0 software and compare the simulation result. The measure antenna parameter such as return loss , gain and far field radiation pattern of this antenna for two dielectric material and given the antenna application for best result.