LAUSR

This article presents a study an ultra‐wide bandwidth (UWB) antenna for ground‐penetrating radar (GPR) applications. The GPR is a favorable technology for detection and identification of buried object as landmine or mummy. Vivaldi antennas are studied in terms of operating frequency range and phase to detect an object buried in the sand layer from 1 up to 10 m. The designed Vivaldi antenna is printed on a thick economic FR4 substrate with concise dimensions 12 ×13 ×1 cm3 and operates in the frequency range that extended from 0.4 GHz up to 10 GHz. Experimental results verified good agreement with the simulated results. The proposed antenna has electrically large length with size reduction about 35% from the original antenna size. Vivaldi shape has large average gain about 17 dBi with above 80% average efficiency to differentiate between hidden object material and their shapes. Three‐dimensional electromagnetic simulator, namely High Frequency Structure Simulator (HFSS) version 14 is used to simulate the proposed antenna.