为克服目前太赫兹扫描成像技术所用扫描天线存在的不足，设计了一种能够实现一维频率扫描的矩形波导窄边开斜缝天线。具体采用设计缝隙天线的等效电路法和泰勒线阵法估算得到缝距、缝长、缝宽、缝倾角和缝数等初始参数。然后在ANSOFT-HFSS软件中建模仿真并优化，最终得到适用于0.101～0.111 THz带宽的天线。仿真结果表明，天线能够在波导的延展方向上按照不同角度发射或接收带宽内不同频率的太赫兹波，扫描角度约为6.1°，各频率点主瓣增益较高、主副瓣电平相差较大。该天线具有结构紧凑、体积小、重量轻、成本低、扫描速度较快的优点，对于太赫兹扫描成像技术具有一定的应用价值。

In order to overcome the shortcomings of the scanning antenna that is used in the current terahertz scanning imaging technology, a rectangular wave-guide antenna with inclined slits in the narrow side which can achieve one-dimensional frequency scanning is designed. Through applying the equivalent circuit method and the Taylor line array method for designing slit antenna, the initial parameters such as slit spacing, slit width, slit length, slit inclination and slit number are estimated. Then, simulation and optimization are done in the ANSOFT-HFSS software. Finally, the antenna which is suitable for 0.101～0.111 THz bandwidth is achieved.The simulation results show that the antenna transmits or receives different frequencies according to different angles in bandwidth in the extending direction of wave-guide so that it can accomplish frequency scanning. Scanning range is about 6.1°. The gain of main lobe is higher and the difference between the main lobe level and minor lobe level at every frequency point is larger. The antenna has advantages of compact structure, small volume, light weight, low cost, faster scanning, which provides a certain application value for the terahertz scanning imaging technology.