Antipodal-Vivaldi Meander-Line Antenna for 5G Applications

A novel fifth-generation (5G) antenna design featuring a single element has been proposed to enhance antenna performance of bandwidth, cross-polarization, and gain parameters. This advanced antenna design incorporates a meander-line radiator and a defective ground plane (DGS) as its core structure. Several techniques have been employed to improve its capabilities. Adding neutralization lines to the antenna radiator enhanced the bandwidth. Additionally, the cross-polarization is reduced, and the antenna gain is enhanced by using an antipodal-vivaldi DGS (AVDGS). These design elements work together to improve the overall performance of the antenna. The suggested single-element antenna possesses a multi-wavelength structure with dimensions of
$W\times L\times H = 28 \times 7\times-1.6\ mm^{3}$
, making it suitable for millimeter-wave applications. The antenna operates at a central frequency of 28 GHz and exhibits a -10 dB fractional bandwidth of 12.78%, a gain of 7 dBi, and a cross-polarization isolation of 17 dB in the E and H planes with the main lobe of the antenna positioned at
$\pm 30^{\circ}$
.