Design of receiver with wide dynamic range for deep ground penetrating radar

Abstract

Because of the depth limitation when using the impulse ground penetrating radar(GPR) for deep detecting, a ultra-wideband(UWB) deep GPR receiver system using ADC for sampling is designed. Several simulations to the traditional balanced door sampling circuit are carried out, the results demonstrate that the main factors which limit the system's dynamic range is the jitter of sampling trigger pulse. The overall structure of new receiver system is designed, as well as the timing control circuit. The highly integrated, low-cost receiver system has improved system's dynamic range from 50dB to 80dB, and has been applied in the deep GPR system of our laboratory.