天线

Chapter one and chapter two analyse the basis theory and give a whole design plan and expatiate the basic exoterica of system inculding primary technology for application. It involves the basic control theory of satellite antenna and analyse for the whole function. Chapter three gives the hardware design which includes hardware etlectrocircuit structure, principle chart, selecting all kinds of parts of the apparatus , the sensor elements and the design of serial communication electrocircuit etc. Chapter four and chapter five introduce software design for the SCM and the personal computer, giving mainly design theory and material program which includ the design of searching for the satellite and searching for the high-point and the program development by Delphi on PC, explaining the basic principium of asynchronous serial communication for epigyny computer and hypogyny computer.

第一、二两章阐述了系统的理论基础及应用的主要技术，包括卫星天线控制基础理论和整体功能分析等等；第三章是系统硬件设计，包括硬件电路组成及原理图、各类元器件的选取及传感器原理，串行通信电路设计等：第四、五两章是单片机、PC机软件设计，给出了主要部分的设计原理及具体程序，包括监控软件设计、寻优设计、寻星设计，PC端Delphi程序设计开发等，并阐述了PC机和单片机异步串行通信的基本原理，是本课题的重点所在。

If atmospherics were all that mattered, the American president would be well on the way to curing the world's ills

如果天线果真有那么重要，那么美国总统可能在治疗世界疾病方面做的相当出色。

When using omnidirectional antenna, use all sorts of attemper advancedly algorithm cannot solve this bottleneck problem effectively.

当采用全向天线时，使用各种先进的调度算法都不能有效解决这个瓶颈新问题。

The analysis shows that the influence of plasma frequency on the attenuation constant of MPCA is increasing, and an extremum point is appeared.

结果表明，强磁场时等离子体频率对天线衰减常数影响增大，且有一极值出现。

In this paper the influence of coma and spherical aberration on the far-field distribution and antenna receiving power is analyzed, in which aberration attenuation factor is introduced and the relation of it to root mean square of wavefront aberration is given.

分析了球差和彗差对信号光远场分布、天线接收光功率的影响，引入了畸变衰减因子，给出了畸变衰减因子与波前畸变均方根值的关系。

The effect of obstacle with special size on audibility factor of DW-ILS is analyzed,and the numerical results are obtained.

采用电磁感应定理计算出了特定尺寸障碍物对分米波仪表着陆系统航向天线辐射场的散射，得到了该障碍物对跑道中心线上可听度系数影响的数值结果，并对此做出了分析。

This experiment is in frequency adjustment X-mitter about that miniwatt frequency adjustment X-mitter operating principle, analyses the debugging making method and their installation, the microphone changes implication into an audible signal, wave an audible signal being modulated as a result of enlarging the day afer tomorrow being in progress to the carrier wave , producing frequency adjustment, by the fact that air wire launching the frequency adjustment electromagnetic wave to the outside , the radio set just can with frequency adjustment meet hear clear implication.

本毕业设计是关于小功率调频发射机工作原理、分析制作方法及其安装调试，在调频发射机中，话筒将话音转化为音频信号，音频信号经放大后对载波进行调制，产生调频波，通过天线向外发射调频电磁波，用调频收音机便可以接听到清楚的话音。

The soft w are was recently updated to include a visual high and low audio response for easier target identification.

该软件使实时代表性的地区，天线，包括高，低和目前的数字读数，该软件是最新更新的，包括视觉，高，低音频响应更容易识别目标。

Because the rank of the augmented channel matrix is always equal to the number of transmitting antennas, the algorithm can work well in an ill-conditioned channel.

由于扩展信道矩阵的秩等于发射天线数，该算法对信道缺秩的情况不敏感。

Easy antenna status check and automatic diagnosis.

简单天线状态检查和自动诊断。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。