星载W波段毫米波辐射计研究  

Study of Spaceborne W-band Millimeter Wave Radiometer

作　　者：李靖[1] 张升伟[1] 孙茂华[1] 孔德才[1] 刘和光[1] 姜景山[1] 

机构地区：[1]中国科学院空间科学与应用研究中心

出　　处：《遥感技术与应用》2002年第1期1-5,共5页Remote Sensing Technology and Application

基　　金：总装备部预研基金资助

摘　　要：在 8 6 3 - 2项目支持下 ,开展了 W波段毫米波辐射计的研究。其工作中心频率为 90 .5 GHz,带宽为 2 GHz,积分时间为 2 0 0 ms时其系统灵敏度达到 0 .6 K,线性度优于 0 .999。这些技术指标基本达到了星载应用的要求。为配合扫描成像研制了两套天线系统 ,一套为 Cassegrain天线 ,另外一套为二元光学天线 ,它是利用光学衍射原理制成的位相型 Fresnel波带片。二元天线具有设计灵活、加工方便、体积小、重量轻、旁瓣电平低和安装方便等优点。W波段微波辐射计系统在实验室内进行了扫描成像试验 ,取得了 W波段微波辐射计扫描图像。The W\|band millimeter wave radiometer has been successfully developed under the support of 863\|2 projects. The operating frequency is 90.5 GHz and the bandwidth is 2 GHz. The sensitivity of the system is 0.6K and the integration time is 200 ms. The linearity is better than 0.999. The technical index attains the goal to be used in space. Two sets of antenna system have been studied in order to accomplish the work of scanning and imaging. One is Cassegrain and another is binary optical antenna. The principle of the binary optical antenna is optical diffraction. This kind of antenna has some advantages: flexible design, easily to be processed, small volume, light weight, low sidelobe and easily to be assembled. The scanning and imaging experiments of the W\|band microwave radiometer have been done in the laboratory and successfully got some images.

关 键 词：毫米波辐射计 二元光学天线 W波段 遥感仪器 

分 类 号：TP73[自动化与计算机技术—检测技术与自动化装置]