A Printed Log Periodic Dipole Array Antenna with Miniaturized Dipole Elements for S-Band Applications

Abstract

LPDA antennas are introduced for the development of broad band applications. In this paper, miniaturized printed log periodic dipole array antennas are presented. Here, antenna miniaturization is accomplished by replacing the uniform dipole elements of the conventional LPDA antenna with Koch curve and meander line without affecting the overall performance of the antenna. The conventional and miniaturized PLPDA antennas exhibiting end-fire radiation over the frequency range of 2 to 4 GHz. At a frequency of 3 GHz, both models have been designed and each model has a gain of approximately 6 dB which is same as the gain of conventional PLPDA, providing VSWR ≤ 2 over the whole operating band. Among 3 antenna models, PLPDA with meander line occupies less space and have large bandwidth. All these antennas are designed and simulated using CST Microwave Studio Suite 2019 and the corresponding results are presented at the end.