One of the most critical hardware components of a ground-penetrating radar(GPR)is the antenna system.Important parameters of antennas,such as antenna bandwidth,radiation waveform and cross coupling determine the GPR s...One of the most critical hardware components of a ground-penetrating radar(GPR)is the antenna system.Important parameters of antennas,such as antenna bandwidth,radiation waveform and cross coupling determine the GPR system performance.The modified TEM horn antenna with distributed resistor load is presented in this paper,and the radiation properties of the antenna with the shields and absorbers are studied through the three-dimensional finite-difference time-domain(FDTD)scheme.Simulations show that the direct signal coupled from the transmitter is decreased by means of the shields and absorbers.Therefore,using the antenna in the GPR system can improve the signal-to-clutter ratio and the dynamic range of the system.展开更多
基金This work was supported by the National Basic Research Program of China(No.2001AA132020).
文摘One of the most critical hardware components of a ground-penetrating radar(GPR)is the antenna system.Important parameters of antennas,such as antenna bandwidth,radiation waveform and cross coupling determine the GPR system performance.The modified TEM horn antenna with distributed resistor load is presented in this paper,and the radiation properties of the antenna with the shields and absorbers are studied through the three-dimensional finite-difference time-domain(FDTD)scheme.Simulations show that the direct signal coupled from the transmitter is decreased by means of the shields and absorbers.Therefore,using the antenna in the GPR system can improve the signal-to-clutter ratio and the dynamic range of the system.
