Antenna compensation for UWB GPR systems applied in Non-Destructive testing

Non-Destructive testing is an enhanced technique based on applying the inverse scattering algorithms upon the received scattered Electromagnetic EM waves for computing some important parameters of the material characteristics as permittivity and reflection coefficients. Unfortunately, the Ultra Wideband (UWB) antennas can dramatically affect the received signal and result in considerable degradation of the overall performance of the UWB GPR system. The isotropic, fully matched, unity gain and frequency independent antenna assumption could never be accepted for the typical UWB antennas, where the radiation characteristics and matching properties vary considerably with the frequency, introducing directionally asymmetric bandwidth reduction and waveform dispersion. Therefore an efficient antenna compensation technique would be introduced in this paper with the corresponding successive EM simulation results.