太赫兹天线是未来第六代移动通信（6G）的重要组成部分，其中太赫兹透镜天线因其高增益、稳定的辐射特性、低成本等优点，受到广泛关注。太赫兹透镜天线不存在馈源遮挡的问题，能够实现多种波束控制功能，其聚焦功能可应用于成像系统，也可在测试装置中起波束准直的作用。太赫兹制作工艺的进步使太赫兹透镜天线的加工精度更高、效果更好，也进一步促进太赫兹透镜天线的发展。本篇综述总结了近五年报道的太赫兹透镜天线，综合其功能、制作工艺、形态、应用场景等特点对它们进行介绍。

Terahertz (THz) lenses have numerous applications in imaging and communication systems. Currently, the common THz lenses are still based on the traditional design of a circular convex lens. In this work, we present a method for the design of a 3D-printed multilevel THz lens, taking advantage of the benefits offered by 3D printing technology, including compact size, lightweight construction, and cost-effectiveness. The approach utilizes an inverse design methodology, employing optimization methods to promise accurate performance. To reduce simulation time, we employ the finite-difference time-domain method in cylindrical coordinates for near-field computation and couple it with the Rayleigh–Sommerfeld diffraction theory to address far-field calculations. This technology holds great potential for various applications in the field of THz imaging, sensing, and communications, offering a novel approach to the design and development of functional devices operating in the THz frequency range.