太赫兹孔径编码成像研究综述

Review of Terahertz coded-aperture imaging

太赫兹孔径编码成像借鉴了光学孔径编码成像和微波关联成像的基本原理,通过反射式天线等技术改变目标区域太赫兹波等效空间幅相分布来实现高分辨成像,具有高帧率、高分辨、前视凝视等诸多优势,是太赫兹雷达的重要发展趋势之一.介绍了太赫兹孔径编码成像提出的背景,系统阐述了其原理、现状、实现方式、关键问题,指出了其在末制导、安检反恐等领域广阔的应用前景,以期为推动太赫兹孔径编码成像和新体制太赫兹雷达研究提供一定的借鉴.

Terahertz coded-aperture imaging is a novel imaging technique which follows the basic princi- ples of optical coded-aperture imaging and microwave coincidence imaging. It is based on the modula- tion of the effective terahertz-wave spatial distribution, either amplitude or phase, over the illuminated area. The wave spatial distribution or illumination pattern is usually obtained by a reflecting antenna. Terahertz coded-aperture imaging has some significant advantages such as high frame rate, high resolu- tion, and the ability of forward looking and staring imaging. Hence it has been regarded as one of the most important development trends of terahertz radars. In this paper, we at first introduce the proposi- tion background of this new technique, and then expound its principles, research states of the art, an implementable setup and the key problems. Finally, the application fields including missile terminal seeking and security as well as anti-terrorism are discussed. We hope that this paper can provide some positive guidance for the study of terahertz coded-aperture imaging and the corresponding new terahertz radar.