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the satellite antenna
相关语句
  卫星天线
     The Design and Studying of the System Makes the Satellite Antenna Aboard the Car up to Moving
     车载卫星天线随动系统的设计与研究
短句来源
     This result have definite worth of reference for the structure design and analysis of the satellite antenna.
     该结果对卫星天线结构设计与分析有一定的参考价值。
短句来源
     The present domestic satellite reception antenna controllers basically are designed according to the extreme value following principle, The satellite antenna controllers can aim at the satellite ,only when the carrier waver signals are received and compared through driving the antenna to circumvoJve repeatedly .
     目前国内的卫星接收天线控制器基本上都是按极值跟踪原理设计的,这种卫星天线根据接收到的载波信号大小控制天线反复转动,才能对准卫星。
短句来源
     Formulas and curves may be used as a reference for determination of the polarization ellipticity of the satellite antenna or Earth station radar antenna.
     公式和曲线可作为选定卫星天线或地面站雷达天线椭圆极化率的参考依据。
短句来源
     The satellite antenna scan drive institution is a core component of the whole satellite system, which has an effect upon the attitude of satellite and gathering data.
     卫星天线扫描驱动机构是整个卫星系统的核心部件,对卫星的运行姿态和数据的采集起着至关重要的作用。
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  “the satellite antenna”译为未确定词的双语例句
     EXPERIMENTS AND ANALYSES FOR CARBON FIBER REINFORCED COMPOSITE MULTI-JOINTS OF THE SATELLITE ANTENNA TRUSS
     卫星桁架复合材料多连通接头性能的测试与分析
短句来源
     The present domestic satellite reception antenna controllers are basically designedaccording to the extreme value following principle. The satellite antenna controllers can aimat the satellite according to the carrier waver signals through driving the antenna tocircumvolve repeatedly.
     目前国内的卫星接收天线控制器大部分是按极值跟踪原理设计的,这种控制器需根据系统接收到的载波信号大小控制天线反复转动,才能对准卫星。
短句来源
     This paper is backgrounded on“DongZhongTong”(DZT for short) satellite communication and television incepting system fixed on moving carrier, mainly researches the application of embedded control technology used on the satellite antenna stabilization platform.
     本文以“动中通”移动载体卫星通信与电视接收系统为背景,主要研究嵌入式控制技术在天线稳定平台中的应用。
短句来源
     In order to meet global scanning requirements of the satellite antenna, a side-fed offset cassegrain (SFOC) antenna is designed in this paper.
     为满足星载天线空间电扫描的要求 ,研究了宽角扫描侧馈偏置卡塞格伦天线 (SFOC)的设计问题。
短句来源
     To improve the wide-angle scanning properties of the satellite antenna, we concentrate on the shaping of the main reflector of the Side-Fed Offset Cassegrain (SFOC) antenna by the method of the ray tracing and the idea of the optimization.
     为改善星载天线的宽角扫描特性,采用射线追踪的方法,通过优化的思想对侧馈偏置卡塞格伦(SFOC)天线的主反射面进行了面赋形设计.
短句来源
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  相似匹配句对
     Satellite Internet
     卫星因特网
短句来源
     SATELLITE & NETWORK
     《卫星与网络》杂志征稿启事
短句来源
     From Theodolite to Satellite
     从经纬仪到卫星的历史性变革
短句来源
     Debugging of satellite antenna
     卫星天线方向的调试
短句来源
     The Satellite Communication System
     PES VSAT卫星通信系统简论
短句来源
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  the satellite antenna
The analysis of global GPS data with these sets of calibration values reveals that the offsets and variations of the satellite antenna phase centers have to be considered, too, to obtain a consistent picture.
      
In addition, the long time-series facilitates the study of correlations of the satellite antenna corrections with several other parameters such as the global terrestrial scale or the orientation of the orbital planes with respect to the Sun.
      
It is demonstrated that the uncertainty in the satellite antenna phase center offset (z-direction) is one of the major reasons for the scale differences.
      
The satellite antenna positioning system can operate both automatically or manually.
      
The satellite antenna radome will be mounted on a pedestal standing about 2 m above the buoy deck.
      
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The polarization mismatch between the beacon signal and radar antenna leads to that, in the error signal voltage of the receiver output, besides the fundamental normal component, there exist fundamental cross component, second harmonics, etc., and then lowers the angular tracking accuracy. By analyzing the case linearly-polarized beacon signal and elliptically-polarized radar antenna, the related formulas and curves are given. The case elliptically-polarized beacon signal and elliptically-polarized radar antenna...

The polarization mismatch between the beacon signal and radar antenna leads to that, in the error signal voltage of the receiver output, besides the fundamental normal component, there exist fundamental cross component, second harmonics, etc., and then lowers the angular tracking accuracy. By analyzing the case linearly-polarized beacon signal and elliptically-polarized radar antenna, the related formulas and curves are given. The case elliptically-polarized beacon signal and elliptically-polarized radar antenna is also illustrated. Formulas and curves may be used as a reference for determination of the polarization ellipticity of the satellite antenna or Earth station radar antenna.

目标信号和雷达天线之间的极化失配,导致接收机输出的误差信号电压中除基波正规分量外,还包含基波交叉分量和二次谐波分量等,降低了测角精度。通过对线极化目标信号和椭圆极化雷达天线匹配情况的分析和计算,获得了有关的公式和曲线。还对椭圆极化目标信号和椭圆极化雷达天线情况作了阐述。公式和曲线可作为选定卫星天线或地面站雷达天线椭圆极化率的参考依据。

This paper describes the test technology about distortions and the measurement results of antenna reflector of synchronous satellite under nonuniform temperature field in vacuum.In order to achieve cryogenic temperature-150℃ and elevated temperature 120℃on the reflector, the solar simulator and infrared heating cage were used to carry out synthetic heat, the cryogenic refrigeration of liquid nitrogen and the method of arranging various reflective plates were used. A larger temperature gradient and the satisfactory...

This paper describes the test technology about distortions and the measurement results of antenna reflector of synchronous satellite under nonuniform temperature field in vacuum.In order to achieve cryogenic temperature-150℃ and elevated temperature 120℃on the reflector, the solar simulator and infrared heating cage were used to carry out synthetic heat, the cryogenic refrigeration of liquid nitrogen and the method of arranging various reflective plates were used. A larger temperature gradient and the satisfactory effect of simulation were obtained. Four work conditions of solar radiation were simulated in the test, the distributions of temperature and strain on the reflector were measured correspon-dently, and the values of thermal deformation and displacements were calculated. This result have definite worth of reference for the structure design and analysis of the satellite antenna.

本文介绍了同步卫星天线反射器在真空非均匀温度场的变形试验技术及其测量结果。为了实现在反射器上达到低温-150℃、高温120℃,采用了太阳模拟器与红外加热笼综合加热、液氮致冷以及设置各种反射板的方法,获得了较大的温度梯度,使模拟效果较为满意。试验中模拟了太阳照射的四种工况,相应地测量了反射器上的温度与应变分布,并计算了热变形与位移值。该结果对卫星天线结构设计与分析有一定的参考价值。

The design and synthesis of shaped reflector antennas is a hot topic in the satellite antenna developments.Our article describes some developments of shaped reflector antennas in Japan,North America and Europe,and draws a comparison between their synthesis methods.

成形反射面天线的设计与综合是近年来卫星天线发展的一个热点问题 ,本文对日本、北美和欧洲成形反射面天线的技术发展和综合方法作了介绍和比较。

 
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