Researching the solutions for expanding the bandwidth of half-wavelength dipole antennas applied in ground-penetrating radar systems

Abstract

Ground-penetrating radar systems have been researched and applied in detecting metal objects at different depth ranges. To ensure their ability, ground-penetrating radar systems need to be equipped with high-bandwidth antennas. In this paper, we present a technical solution to extend the antenna bandwidth at 900 MHz by improving the halfwave dipole antenna to a bowtie dipole antenna. The analysis of operating principles and calculation, simulation on CST 2019 software show that the bandwidth of antennas is significantly expanded when changing from the ordinary half-wave dipole form to the bowtie dipole form. This aims at meeting the specific requirements of ground-penetrating radar systems.