A Centrosymmetric Triple-Tail Bow-Tie Antenna for Ground Penetration Radar

The ground-penetrating radar antenna (GPR) can detect targets underground or in walls without destruction. This time-saving and cost-friendly detection method has been applied in various civil engineering. The GPR system working at around 2.0GHz can be used to inspect pavement materials, probe cracks in walls and detect landmines, etc. This paper proposes a three-tail bow-tie antenna with |S
11
| <-10dB bandwidth from 1.45 to 2.4GHz. The antenna also has a bandwidth of 0.6GHz with |S
11
| <-20dB. A double-layer director is designed to reduce the cross-polarization and enhance the core-polarization to 3dB.