星载太赫兹微波辐射计发展现状及应用展望

Status and application outlook of spaceborne terahertz microwave radiometer

摘要:

简要阐述了星载微波辐射计功能特点、主要指标、工作原理和典型系统组成，结合准光馈电系统和接收机等关键组成以及灵敏度等关键性能指标应用需求，重点介绍了目前国内外星载太赫兹频段极化栅网、频率选择表面、馈源喇叭、接收机前端等研制水平和应用现状；比对了关键指标的技术差距，分析了太赫兹频段产品设计、研制技术难点。针对我国后续星载微波辐射计研制需求，对关键太赫兹部组件发展趋势和应用需求进行了梳理和展望，为我国星载无源遥感发展提供借鉴。

Abstract:

The function characteristics, main indicators, working principle and typical system compositions of the spaceborne microwave radiometer are briefly introduced. The development level and application status of current domestic and foreign spaceborne terahertz band polarization grid, frequency selective surface, feed horn, receiver front-end etc, are highlighted by combining with the key components of quasi-optical feed system and receiver, as well as the application requirements on key performance specifications such as sensitivity. The gaps between key specifications are compared. The technical difficulties in product design and development of terahertz frequency are analyzed. In view of the development demand of spaceborne microwave radiometer of China, the development trend and application demand of key terahertz components are prospected, providing reference for the development of spaceborne passive remote sensing in China.