美国研发出降低发射燃耗的新型发动机

美国佐治亚理工学院的“佐治亚理工”（Georgia Tech）项目研究人员开发出一台新型发动机样机，能够利用较少燃料发射卫星，从而为深空任务、低成本发射和运送更多载荷开启大门。     

CAST Xi'an Branch Established

China Academy of Space Technology (CAST) Xi'an Branch was established on April 8,2008.The new branch consists of the headquarters of the former Xi'an Institute of Space Radio Technology (XISRT) of CAST and five former subsidiaries of the XISRT,i.e.the Institute of Space Electronic Technology,the Institute of Microwave Technology,the Institute of Space Antenna Technology,the Manufacturing Center for Space Electronics and Civilian High-tech Company.Four new units are set up based on the business categories...     

科技信息

美国研发出降低发射燃耗的新型发动机美国佐治亚理工学院的“佐治亚理工”(Georgia Tech)项目研究人员开发出一台新型发动机样机,能够利用较少燃料发射卫星,从而为深空任务、低成本发射和运送更多载荷开启大门。由宇航工程学院的米切尔.沃克博士领导的研究小组利用普惠公司赠送     

CASC Consolidates Its Liquid Propulsion Sector

To consolidate its liquid rocket engine development ability,China Aerospace Science and Technology Corporation(CASC) integrated several of its subsidiaries,Beijing Aerospace Propulsion Institute,Beijing Institute of Aerospace Testing Technology.and Shanghai Institute of Space Propulsion(SISP)into the Academy ofAerospace Liquid Propulsion Technology (AALPT).The establishment of the new AALPT was announced on July 22 in Beijing.The reorganized AALPT is the only specialized     

China Aerospace Academy of Systems Science and Engineering Established

正On April 24,2016,the first National Day of Space Flight,China Aerospace Academy of Systems Science and Engineering(CAASSE)was officially established.Established from the former Beijing Institute of Information and Control and the Institute for Astronau-     

Shen Zhou Institute Explore More Cooperation With IAS

T he Shen Zhou Institute, a subsidiary of CAST signed an educational resources exchange and cooperation agreement with Aeronautics and Space Institute (IAS) of France in early June, 2006. IAS Managing Director Michel Reynes paid a return visit to the Shen…     

Space Law Conference 2004 Held in Beijing

pace Law Conference 2004jointly organized byInternational Institute of SpaceLaw (IISL) and China Institute ofSpace Law (CISL) was held in Beijing,China on 26-27 April 2004. Thepurpose of this conference is toincrease knowledge and expertiserelating to space law in China and the     

Static Test of LM-5 First Stage Hydrogen tank Successful

<正>The Beijing Institute of Structural and Environmental Engineering and the Beijing Institute of Aerospace Testing Technology carried out the liquid hydrogen medium cryogenic static test on hydrogen tank of LM-5 first core stage recently.The success of the test was a critical step     

Ground Static Tests for LM-5 Tanks Completed

<正>On December 17,2015,the Beijing Institute of Structural and Environmental Engineering and the Beijing Institute of Aerospace Testing Technology successfully conducted a liquid nitrogen medium destructive test of LM-5 first stage hydrogen tank,marking the completion of the ground static tests for LM-5 tanks.     

微波聚焦天线的工程设计

介绍椭圆球反射面聚焦的原理,并对利用圆反射面逼近椭圆球反射面的原理、公式进行了探讨。实践应用证明:采用该方法设计的聚焦天线既能保证获得较好的聚焦性能,又能有加工方便、效果良好等优点。     

China's First Joint Lab for Space Nuclear Propulsion Technology Set up in Beijing

正The Beijing Institute of Control Engineering(BICE),the Department of Reactor Engineering Research and Design under China Institute of Atomic Energy and the School of Astronautics,Beihang University jointly established a joint laboratory devoted to the research of space nuclear propulsion technology.Led by BICE,the lab aims at meeting the requirement for deep space exploration missions and conducts studies on     

高效率宽频带新型短背射螺旋天线

给出一种适合空间应用的新型高效率宽带背射螺旋天线，应用背景是UHF频段卫星移动通信。在L波段给出了1：5缩比样机的方向图、阻义气风发及增益等参数的实测结果。实验结果表明，此项新方案结合了谐振腔型天线效率高以及螺旋天线频带宽的长处，其口面频率达到甚至略大于1，而输入阻抗带宽（驻波比＜1．2）接近15％，方向性增益带宽（下降1dB)可达12％，较之一般短背射天线1－2％的带宽有很在改进。     

Breakthrough Made on the Nondestructive Testing of Orbital Spacecraft

Lanzhou Institute of Physics, a subsidiary of CAST, conducted ground testing on its newly developed eddy current nondestructive testing equipment, demonstrating an important breakthrough had been made with the nondestructive testing of orbital spacecraft. The equipment works steadily and has met the design requirements for space applications. It was also announced by the Institute that the equipment would be used during the next lunar exploration mission to detect the status of the     

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SPACECRAFT ENVIRONMENT ENGINEERING publishes both academic and technological papers. Sponsored and published bimonthly by Beijing Institute of Spacecraft Environmental Engineering     

关于DBS小口径接收天线选型几个问题的探讨

一个典型的双反射面天线效率大约与１６个因子有关。本文从理论上分析了正馈和偏馈对天线效率影响的各种因素。天线偏馈能改善遮挡因子ηｂ，但同时会引发漏射效率因子、照射效率因子、交叉极化效率因子等下降、波束偏移等一系列问题。文章指出，用正馈天线具备多种优点。对于在给定Ｃ／Ｎ和ＥＩＲＰ情况下如何选择天线口径作了论述，并讨论了小口径天线Ｋｕ／Ｃ兼容、ＥＩＲＰ与天线余量等问题。     

遥测跟踪用的新型双频段天线

天线系统采用双频工作的目的是为了提高可靠性或增加数据带宽。关键的部件是具有频率选择功能的二向副反射器。这种反射器对X波具有强烈的反射作用,而对S波则是透明的。本天线是完全对称的天线,对2.2～2.4GHz S波进行接收与自动跟踪,对X波的7.2～8.6GHz进行接收。副反射器频平选择面具有预定的性能,两天线同时具有右旋和左旋圆极化输出。文中给出了整个系统的外观、几何图形及性能。系统使用性能优异的RADSCAN锁源。结论认为:利用频率选择面的原理是实现高质量双频天线系统的有效途径。使用这种天线系统,将可以实现自动跟踪和双频遥测接收。     

飞行器载低剖面倒F天线特性分析

用于飞行器上的遥测天线通常要求较宽的方向图覆盖范围、简单的外形结构和很低的天线高度。文中用CAD的方法计算并分析了飞行器上几种安装状态的低剖面倒 F形天线的辐射与输入驻波特性 ,提出一种改进型低剖面倒 F天线的设计思路     

平面裂缝阵天线的原理与设计

介绍平面裂缝阵天线工作原理和设计方法;着重论述平面裂缝阵天线参数的选择原则及其设计方法、单脉冲馈源的设计考虑,并通过实例验证设计分析方法的可靠性.