Simulation of Airborne Ground Penetrating Radar Model for Detecting Underground Targets Based on CST-MWS

Abstract

A ground penetrating radar model for detecting buried objects is simulated in this paper. By transmitting high frequency electromagnetic wave from antenna to underground, when electromagnetic wave propagates in underground medium, it reflects at the interface of electrical difference. According to the waveform, amplitude intensity and radar scattering area of the received electromagnetic wave, the underground objects can be inferred. Its space position and burial depth in the medium can be judged approximately. The model includes a ground model of a buried object and an antenna that transmits and receives signals. A helical antenna is used with a center frequency of 480 MHz, which makes the antenna suitable for GPR applications for detecting underground targets. The antenna is fed by a coaxial line with an inner diameter of 5 mm and an outer diameter of 13.5 mm. CST-MWS is always used to simulate electromagnetic problems in time domain and broadband, electrically large size model. In CST-MWS, the far-field data of antenna simulation results are used as the source of ground penetrating radar model to simulate the detection results of airborne ground penetrating radar at a certain height over the ground. This work proposes to give a leading way on the designing of new type airborne GPR, before taking experiments in a controlled laboratory environment.