Reflectivity of electromagnetic (EM) wave in shallow ground penetrating radar (GPR) survey

Ground penetrating radar (gpr) is a geophysical method that is widely used in geophysical surveys,civil engineering applications,archaeological studies and locating underground utilities or hidden objects. it works by sending electromagnetic (em) wave into the ground by transmitter and recording the returning signals by receiver. the returning signals bring information about the materials and changes in material parameters at different depths. the changes in dielectric properties (ɛ) of two adjacent media result in em wave reflections. in this study,several types of materials with different dielectric properties (ɛ) are used in order to identify the reflectivity of the em wave. results prove that the larger the dielectric contrast,the higher the reflection coefficient thus the stronger the reflection. © 2016 penerbit utm press. all rights reserved.