Dielectric response of sandstones of Rajasthan in the frequency range 200 MHz-20 GHz

Abstract

Dielectric response (ε', ε'') of nine different dry and water saturated sandstone samples of Rajasthan were measured in the frequency range 200MHz-20GHz. Result has been presented in the form of variation with frequency which showed characteristics features. The change observed in dielectric characteristic with water saturated sample is interpreted as existence of water molecules in free space of sandstones samples. The mechanisms that influence the dielectric values of sandstone are strongly dependent on the frequency of electromagnetic field. The ac conductivity, bulk density and porosity were also measured for dry and water saturated sandstone samples.