室内实测数据太赫兹合成孔径雷达成像研究

合成孔径雷达实现高分辨率成像要求平台作理想匀速直线运动，相对传统微波SAR而言，太赫兹波的波长更短，SAR平台高频微小振动对常规微波频段 SAR影响几乎可以忽略，对太赫兹合成孔径雷达（Terahertz synthetic aperture radar ，T Hz‐SAR）的影响必须精细处理，研究适用于 T Hz‐SAR的成像补偿算法是必要的。本文建立 T Hz‐SAR非理想情况下的回波模型，分别从时域和频域详细分析运动误差对回波的影响。提出了一种基于回波数据的T Hz‐SAR成像运动补偿算法，采用中心频率0．3 T Hz的SAR系统进行实验，使用RD算法对目标进行二维高分辨成像，得到3个角反射器的二维SAR图像。实验结果验证了系统的可行性和所给处理算法的有效性，为外场车载或机载的T Hz‐SAR成像奠定了基础。

Research on terahertz synthetic aperture radar imaging based on indoor experimental data

Synthetic aperture radar to achieve high resolution is based on the premise that the platform is an ideal uniform linear motion .Relative to the traditional microwave SAR ,because of the short wavelength of terahertz wave , SAR platform of high frequency micro vibration impact on conventional microwave band SAR is almost negligible but terahertz synthetic aperture radar ( T Hz‐SAR ) must be fine processing .It is necessary to study the imaging compensation algorithm suitable for THz‐SAR .In this paper ,the echo model of THz‐SAR is established ,and the effect of motion error on the echo is analyzed from the time domain and frequency domain respectively . A motion compensation algorithm for THz‐SAR imaging based on echo data is proposed ,the SAR system with center frequency 0 .3 THz is used to carry out the experiment ,and the 2D image of the corner reflectors is obtained .The experimental results verify the feasibility of the system and the effectiveness of the algorithm ,which lays the foundation for the field vehicle or airborne T Hz‐SAR imaging .