毫米波及太赫兹准光学技术：理论、应用与发展

针对毫米波及太赫兹技术在遥感、天文探测以及成像等领域的应用，讨论了准光技术的基本原理、关键器件、系统构成及其技术优势；探讨了准光技术国内外现状及未来的发展趋势。准光技术是基于高斯波束在自由空间中传播而进行系统设计与分析的一种技术。利用准光技术实现的毫米波及太赫兹系统具有高功率处理能力，具备多极化、低传输损耗以及紧凑性等优点。准光技术在未来的各个领域将会有更加广阔的应用前景。

Quasi-optical technology in the millimeter and terahertz wave ranges: theory, applications and development

This paper gives an overview to the fundamental principles, key components, system design and technical advantages of quasi-optical technology, particularly for its applications in the millimeter and terahertz systems in fields of remote sensing, radioastronomy, and imaging. A perspective to the state-of-the-art and future development of quasi-optical technology has been given. Quasi-optical technology is a set of system design and analysis techniques based on Gaussian beam propagation in free space. Systems based on quasi-optical technology bears advantages of high-power handling capability, multi-polarization, low transmission loss, and high compactness. In the future, quasi-optical technology will be seeking more applications in these areas and further development can be highly envisaged.