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介绍了0.2 THz频率步进雷达系统以及获得一维距离像的方法,并利用0.2 THz雷达对角反射器进行距离像分辨率实验,分析了频率步进信号相位不一致对一维距离像以及分辨率的影响,提出了回波相位补偿的方法.经过相位补偿后,目标距离像分辨率和信噪比都显著提高,分辨率达到了厘米量级.仿真和实验结果表明,宽带太赫兹频率步进雷达经过相位补偿,可以对目标进行高分辨率成像,从而为太赫兹雷达二维和三维成像奠定了基础.
The 0.2 THz frequency stepping radar system and the method of obtaining one-dimensional range image are introduced. The range-resolution experiment of the diagonal reflector with 0.2 THz radar is carried out. The results show that the phase of the frequency stepping signal is inconsistent with the one-dimensional range image and the resolution The method of echo phase compensation is proposed.After the phase compensation, the target distance image resolution and signal to noise ratio are significantly improved, the resolution reaches centimeter level.The simulation and experimental results show that the broadband terahertz frequency step The radar is phase-compensated for high-resolution imaging of the target, thus laying the groundwork for 2D and 3D imaging of a terahertz radar.