查询词典 in-line antenna

With the overview of present MIMO antenna research, the thesis brings forward a new kind of polar diversity antenna array applied in MIMO base stations, which elements are planar printed dipoles. The beamforming technology is used to obtain a particular type of elevation pattern, which has square cosecant characteristic.

本文在对目前MIMO 天线领域的研究动态进行概述的基础上，结合基站的自身特点，提出并实现了一种新型的基站极化分集波束赋形天线阵列，其阵元为平面印刷偶极子，阵列在俯仰面形成类似平方余割形式的方向图分布。

On the basis of studying law of Farad Electromagnetic Induction and the antenna theories in electrodynamics,We can improve the device — semi-wavelength antenna —which is used for receiving electromagnetic waves and apply it to Farad Electromagnetic Induction Experiment.

在研究法拉第电磁感应定律和电动力学中有关天线理论的基础上，将电磁波的接收装置—半波天线加以改进，应用到法拉第电磁感应实验中去，即能方便直观地验证法拉第电磁感应定律，也能形象地诠释麦克斯韦方程的物理意义。

Based on the project of Cruise Antenna for Receiving DBS Video Signal, we analyze and design the foreside antenna and the circuit of comparing intensity of signal received from DBS satellite in this paper.The project has the great achievements as below.?

本文结合"DBS数字卫星广播移动接收天线"项目，对其前端天线进行了研究与实现，并对天线在载体移动过程中寻星和锁定卫星的关键电路—接收信号幅度比较器进行了研制。

Features: Near-field RFID operation to enable reading of Item Level Tags Work with UHF Gen2 RFID tags that incorporate an inductive near-field component including the Button, Paperclip and Satellite tags High performance, low cost antenna solution Table top or table bottom mounting Specifications: Information in this specification is subject to change without further notice The CS-777 near-field reader antenna is a key enabling technology for UHF Gen2 Item-Level Tagging systems.

它可用于零售和制药应用，图书馆系统，文件控制，检查柜台和许多其他应用程序需要一个短距离和密集读取范围的限制的关建技术应用。近场的RFID运作，使项目级标记阅读超高频二代RFID标签的工作融合了归纳近场组成，其中包括高性能，低成本的天线解决方案表顶部或底部安装表规格：使技术UHF第二代产品级别标记系统。

The possibility of works with the integrated antenna both to the method and to the transfer, in the opinion of producer, it makes possible to forego the wire head sets (wire which usually is used inthe role of antenna).

的可能性，工程与集成天线既要方法和技术转让，在民意的生产者，它使得有可能放弃钢丝头部套（钢丝通常是使用中的作用天线）。

In this thesis, we studies four key problem of 3G base station array antenna for mobile communication, designed radiation units, array synthesis, feeding network and antenna measurements.

本论文主要研究了基站天线的四个主要的问题：设计阵列的辐射单元、阵列的综合、馈电网络的实现和基站天线的测量。

Now our main products are: PTX-LCD, TEX-LCD/S, BLUES30NV serial FM exciters, TX serial 1-10KW FM transmitters, TX serial 3-20KW hot plug-in transmitters, AJ1F serial vertical polarization FM antenna, DPA serial panel FM antenna, star-point or bridge style FM multiplexor, digital STL microwave link, professional receivers and any TV related products.

公司主要产品有：PTX-LCD/S，TEX-LCD/S，BLUES系列调频激励器，TX系列1-10KW调频发射机，TX系列3-20KW热插拔数字调频发射机，AJ1F系列各种功率等级的垂直极化调频天线，DPA系列带反射板偶极子调频天线，星型，桥型系列大功率调频多工器，数字STL微波传输系统，专业调频收转机等及所有电视设备产品

So it holds a ideal ability to anti-interference and has 2 scalar level resolution in location and measuring velocity than traditional radio induction technology. And the channel composed of the new radio induction system for communication is different from the parameter-constant channel and the traditional parameter-changing channel, its parameter is decided by the mutual induction between its antenna and induction-cable, by the location of its antenna, by the signal frequency passing through, its parameter has nothing to do with the time parameter.

而且，由新型无线感应系统组成的信道既不是恒参信道，也不是一般目前所知的变参信道，其信道传递函数的幅值只与信号的频率有关，与系统中天线和感应电缆之间的互感和天线的位置有关，而与时间无关，其信道传递函数的相位只与天线的位置有关，而与时间无关，由新型无线感应系统组成的信道是一种不随时间变化的新型变参信道。

And multiobjective optimization of complex structure with the help of neural networks and uniform experiment design, etc. As an example to illustrate the theory of this thesis, Robust design of a 10m antenna reflection part with circular paraboloid surface is proceeded. Antenna attracted people's research in these years because it is structure with very high precision.

作为实例，论文中对某10m圆抛物面天线反射体进行了健壮性设计，得到了原问题的健壮最优解，不仅实现了原系统的性能优化，同时使天线的性能在受到可控因素较大的范围的变异时所产生的变异达到最小，实现了系统的健壮性。

With rapid development of space technology and continual updating of communication device, the requisition for antennas becomes higher and higher. General method of Far-Field measurement of antenna has much difficulty in its implementing, even powerless sometimes. So people aspire after a way to calculate radicalization field of antenna by measuring its near field.

随着空间技术的迅速发展以及通信设备的不断更新，对天线的要求越来越高，常规的远场测量天线的方法由于实施过程中存在许多困难，有时甚至无能为力，于是人们就渴望通过测量天线的近场而计算出其辐射场的方法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。