Miniaturized antenna using DGS and meander structure for dual-band application

Abstract

In this article, the design of a miniaturized planar antenna using defected ground structure (DGS) and meander line structure for C and X-band applications is presented. A novel star-shaped and a rectangle DGS created on the ground plane of lambda/4 fed planar antenna and its effect on the size reduction performance is analyzed. Initially, a simple basic antenna (antenna-1) operates at 14.9 GHz with a reflection coefficient (S11) of −34.56 dB is designed. To achieve miniaturization of 51.27% and 36.77% an antenna is designed by DGS and meander line structure (antenna-2), which operates at dual-band frequencies 7.26 and 9.42 GHz with a reflection coefficient (S11) of −32.91 and −22.84 dB, respectively, is presented. The suggested antenna is fabricated on a 1.6 mm thickness of FR4 Epoxy substrate to achieve a reasonable peak gain and directivity of 3.64 and 5.94 dBi at 7.26 GHz, 3.23 and 5.44 dBi at 9.42 GHz, respectively, is achieved.