Abstract: LPDA antennas are introduced for the development of broad band applications. A printed log periodic dipole array (PLPDA) antenna using substrates FR4, RT5880 and ARLON is reported in this research. Among 3 substrates, PLPDA with FR4 provides wide bandwidth of 2.75GHz. The designed PLPDA antenna with FR4 exhibiting end-fire radiation over the frequency range of 2.12GHz to 4.87GHz. The peak gain of the designed model is 6.9dBi with VSWR ≤ 2 over the whole operating band. The CST Microwave Studio Suite 2019 is used to design and model the antenna and the corresponding performance characteristics are presented at the end.

Keywords: PLPDA, FR4, RT5880, ARLON.