查询词典 block antenna

Our main products include: cast iron inspection plate, crossed plate, welding plate, T-slot assembly platform, boring and milling machine table, coordinate platform, electrical test platform, Fire Works platform, floor boring machine table, magnesium light ping-foot aluminum, cast iron-type ping-ping-foot, bridge-type flat feet, feet, square, angle ruler tool dedicated, inspection box, line box, magnetic box, magnetic V-frame, deflection tester, gear beat tester machine testing wand adjust Sizing Block Machine, Machine Tool Sizing Block earthquake, ladder Sizing Block, contour Sizing Block.

我公司主要生产的产品有：铸铁检验平板、划线平板、焊接平板、T型槽装配平台、镗铣机工作台、三座标平台、电机试验平台、火工平台、落地镗床工作台、镁铝轻型平尺、铸铁平型平尺、桥型平尺、方尺、直角尺、机床专用角度尺、检验方箱、划线方箱、磁性方箱、磁性V型架、偏摆检查仪、齿轮跳动检查仪、机床检验棒、机床调整垫铁、机床防震垫铁、阶梯垫铁、等高垫铁。

It is concluded that when a small solid angles range adjacent to the main direction in the far field is considered, the parallel beams combining of compact antenna arrays has its priority if the phases can be controlled, and the parallel beams combining of sparse antenna arrays has its priority if the phases can not be controlled.

分析表明：当关注的是远区主方向邻近的小立体角区域时，若能做到控相激励，宜采用紧凑阵的平行波束合成；若不能控相，宜采用稀疏阵的平行波束合成。

The antenna is a necessarily important component in Radar system,whose stealth is a problem that puzzled the technology researchers all the while.The flight vehicle needs antenna to find its aim when reentering the aerosphere,and it also needs the protection by radome at the same time.

天线是雷达系统中必不可少的重要组成部分，其隐身是一个长期困扰着工程技术人员的问题，飞行器再入大气层时需要靠雷达天线来搜寻目标，雷达天线则需要天线罩来保护。

As these clamps are plastic, they will not interfere with the operation of the antenna, while all-metal mounts placed in the radiation pattern could affect the operation of the antenna.

因为这些卡子是塑料的，所以它们不会对天线造成干扰，而所有金属托架都会影响天线的辐射。

According to the theory of electromagnetic field and the theory of error a nalysis,the far field condition for antenna test is discussed,the influence of limited test distance on antenna far field measurement in a microwave anechoic chamber is analysed, and the error model is established.

利用电磁场和误差分析理论，在阐述天线远场测量条件的基础上，分析了微波暗室有限测试距离对天线远场测量的影响，建立了误差模型，并结合实例说明了微波暗室有限测试距离对天线场强测量、增益测量的影响。

First, the basic tracking laws of the user satellite s satellite-satellite antenna are deduced and according to several different conditions, the expressions for the azimuth angle and elevation angle of the satellite-satellite antenna are revised.

针对几种情况，并考虑地球的隔断影响和天线的自身限制，对星-星天线的方位角和俯仰角表达式进行了修正和补充。

Then based of it, we combine the log periodic antenna with the biconical as a broadband assembled antenna.

然后在此研究基础上对三角天线进行研究分析，并将对数周期天线与之组合设计制造出一副组合式宽带天线，用于展宽对数周期天线的频带宽度。

In this paper the dimension parameters which influence the electrical properties of the biconical antenna is discussed by means of simulation and experimental test. And a biconical omni-directional antenna array operating within 0.8~3GHz is designed. Its design parameters and the results of the simulation including curves of the VSWR, radiation pattern and the gain within the band are also given.

本文通过仿真与实验测试对影响双锥天线电性能的各种尺寸参数的作以探讨，并且设计了一种可工作于0.8～3GHz的宽带双圆锥全向天线阵，给出了该天线的具体结构尺寸以及仿真后的VSWR数据曲线，E面，H面辐射方向图和频段内各频点的增益值，以及此天线在0.8～3GHz范围内的VSWR测试数据曲线，并进一步提出了一些设计此类天线的关键点。

with the development of satellite navigation communication,antenna is a very important unit,performance of the satellite navigation communication system is affected by it partly.a new type of bifilar helix for satellite navigation communication system is introduced,and the traving-wave bifilar helix is analyzed briefly.meanwhile,the design and the test results are given.the results show that the antenna possesses excellent circular hemispherical beam with wide angle circular polarization and better impedance match,and has a compact structure and high integration.it can be applied in caps systems successful.

小 摘要：随着卫星导航通信技术的迅速发展，天线作为卫星导航通信系统中的重要部分，在一定程度上决定着卫星导航通信系统的性能。介绍一种用于卫星导航通信系统的双臂螺旋天线，讲述爬行波式螺旋天线的设计过程，并给出最终测试结果。结果表明，该天线具有优良的圆对称半球波束，良好的广角圆极化特性和优良的阻抗匹配特性，其结构简单、紧凑，为通信入站回传提供了一种优良的选择。

Company's main products are indoor coverage systems used in aluminum chamber, the board antenna, rubber antenna, eight antennas, and other wood used in plastic housings.

公司主要产品有室内覆盖系统使用的铝腔体，板型天线、橡皮天线、八木天线等所使用的塑料外罩。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？