Tri-Band Slotted Monopole Antenna for Vehicular Applications

This paper presents a compact wideband antenna specifically designed for vehicular applications within the sub-6 GHz 5G network band, encompassing a frequency range from 1.71 GHz to 5 GHz. The design incorporates a rectangular patch with a stepped structure, featuring two symmetrically raised monopoles on an FR4 dielectric material substrate. To enhance passive isolation without increasing the spatial gap between elements, a partial ground plane structure is integrated beneath the radiating patch. This configuration maintains a low-profile design while ensuring robust electrical performance across the entire frequency spectrum, consequently improving impedance bandwidth. With its compact form, broad bandwidth, and enhanced radiation characteristics, the antenna emerges as a practical choice for wireless communication devices operating within the 1.71 to 5 GHz frequency bands.