摘要
冰云探测对气候预测有重要价值,但因冰云粒子的影响,传统气象观测方法很难有效观测气候。太赫兹波的信号带宽较宽、波束较窄,在冰云探测上比使用微波毫米波更具优势。太赫兹冰云探测仪作为被动接收设备,具有体积小、功耗小的特点,与成本低、研发周期短、可以实现组网观测的Cubesat卫星平台有较高的契合度。以冰云探测为背景,分析太赫兹冰云探测仪系统指标,设计874GHz接收机系统的链路。在确保接收机系统性能的同时注重简化链路,减少体积功耗,以适应Cubesat平台,并结合工程经验在链路设计时采取预留增益余量、加入隔离器增强匹配等措施保证工程上的可实现性。最后对接收机链路进行ADS仿真,仿真结果能够满足冰云探测仪对接收机指标的需求。
Observation of ice cloud is of great value to meteorological prediction,but it is difficult to observe ice cloud effectively based on traditional meteorological observation methods due to the characteristics of ice cloud particles.The terahertz wave with wider signal bandwidth and narrower beam has more advantages than microwave and millimeter wave detection in the ice cloud detection.As a passive receiver,terahertz cloud detector with small size and small power consumption suits the Cubesat platform with advantages of low cost,short development cycle and convenient network observation.In this paper,the terahertz ice cloud detector system is analyzed for the application of the ice cloud detection,and some works are done to fit the Cubesat platform with uncompromised performance including the receiver link simplification,the receiver volume compression and the power consumption reduction.Engineering experience ensures the project implementation,such as the reserved gain margin and the use of isolator to enhance matching.The simulation based on the 874 GHz receiver system link through advanced design system(ADS)is completed to meet the requirements of ice cloud detection.
作者
张欣
胡伟东
刘瑞婷
司炜康
李雅德
刘芫喽
LIGTHART Leo P.
ZHANG Xin;HU Weidong;LIU Ruiting;SI Weikang;LI Yade;LIU Yuanlou;LIGTHART Leo P.(Beijing Institute of Technology,Beijing 100000,China;Delft University of Technology,Delft 2628 CN,Netherlands)
出处
《上海航天》
CSCD
2018年第2期144-150,共7页
Aerospace Shanghai
基金
国家自然科学基金重大科研仪器项目(61527805)
国家自然基金面上项目(41775030)
教育部高等学校创新引智计划项目(B14010)
