It uses multi-ring slot structure. Left hand circular polarization reconfiguration and right hand circular polarization reconfiguration can be achieved in 4.9GHz and 5.8GHz at the same time through the control of MEMS switch, the band-width of the two frequency band is 11.2% and 13.8% respectively. It realizes the dual-band character of polarization reconfigurable microstrip antenna, which can meet the needs of mobile communications.
它在MEMS开关的控制下，可在4.9GHz和5.8GHz两个频率上同时实现左旋和右旋圆极化，两个频带的相对带宽分别达到11.2%和13.8%，很好地实现了圆极化可重构天线的双频带特性，能够满足移动通信对多频技术的需求。
The holding part of the said antenna coupling member is pluggable supported on the fixed antenna which is mounted on the said mobile communication terminal at exterior mode.
本发明的另一特征是：上述天线连接构件的把持部可插拔地支撑于以外置方式安装在上述移动通信终端上的固定天线。
In chapter 1, the development and status of mobile terminal antenna system are summarized. In chapter 2, the basic technology for mobile terminal antenna system is introduced. Chapter 3 illustrates the electromagnetic characteristics of the diversity antenna system for handset. Chapter 4 presents a method of the main beam scanning by multi-feed, and analyzes the scanning properties of both planar antenna and twomonopole antenna for handset. In the last chapter. the fbnction and usage of electromagnetic simulation software are presented.
本文在第一章对移动终端天线系统的发展和现状进行了综述；第二章介绍了移动终端天线系统设计的基本技术；第三章介绍了手机分集天线系统的电磁特性；第四章提出了通过多馈电的形式来实现主波束扫描的方法，并分析了平面天线和手机双天线的扫描特性；第五章介绍了电磁仿真软件的功能及使用方法。
As a module of mobile satelliate communication equipment, it can provide a voltage inverse ratio to crab-angle of antenna bearing, and identify the signal source locked by antenna servo. Six chapters were divided in this paper.
本课题为移动环境下进行卫星通信设备中的一个组成模块，主要目的是在卫星天线指向可能的目标卫星后确认是否为所需对象，同时在设备进行步进跟踪时提供信号电平反馈。
Moreover, in the application of mobile communication, we change the weights of the antenna to change the main lobe, and then fulfill real-time tracking of the wanted signal.
而且，在移动通信系统的应用中，通过调整阵列的加权来实现阵列主波束对需要信号的快速跟踪，这对阵列天线的扫抽性能也提出了更高的要求。
Then, the required feature of transmitting and receiving antenna used in base station and mobile terminal of the MIMO system are analyzed.
本文在介绍了MIMO系统天线基本理论的基础上，详细阐述了MIMO系统天线单元的设计方法，并通过实测和仿真实验对所设计的天线单元进行了验证。
This was because most cities had only one antenna tower for mobile phones.
这是因为大多数的城市里仅有一个供手机使用的中继站。
The main products for mobile television antenna, antenna adapter, whip antenna and so on.
主要产品为手机电视天线、网卡天线，拉杆天线等。
The Sierpinski fractal antenna with two iterations has dual-band property at some flare angle, could applied to satellite communication and mobile communication extensive.
在一定张角下二次迭代Sierpinski分形天线具有双频特性，可广泛的应用到卫星通信和移动通信中。
Please note that because of possible interference to electronic equipment, some vehicle manufacturers forbid the use of mobile phones in their vehicles unless a handsfree kit with an external antenna supports the installation.
请注意，为避免可能干扰汽车的某些电子系统，有些汽车制造商不允许在车内使用行动电话，除非在车内安装附带外接天线的免持组件。
In this paper, we proposed a planar monopole antenna with simple structure, planar design, at high frequency has good impedance bandwidth, and low profile (antenna height less than 0.04 times the operating wavelength in the free space) for research and the discussion. Especially, the low profiled design can save the space of the antenna occupies in the mobile handset.
在本文章中，我们提出一结构简单、平面设计、在高频具有好的阻抗频宽、与低姿态（天线突出高低於操作频波长的0.04倍）的单极平面天线做研究及探讨，尤其低姿态的设计可使天线在手机机壳内所占的空间相当的小。
Irect-sequence code-division-multiple-access is the most popular of CDMA techniques because of its many attractive properties for the applications in the third-generation mobile communication. Its frequency can be flexibly reused. It resists multi-path fading and jam-up. RAKE receiver can be used to combine the received signal energy from different radio propagation paths in order to combat the effect of multi-path fading. Soft handover, soft capacity, soft feed-forward error-correcting code, sectored antenna array and adaptive beamforming, multi-rate, multi-system overlay can be used.
S-CDMA是最欢迎的CDMA技术，因其具有许多适用于无线媒体的特点而被第三代移动通信广为采用：可频率重用，抗多径衰落，抗阻塞，可利用RAKE接收实现多径分集组合，软容量，软切换，可以很自然地利用语音活动周期而变速率传输，可以覆载在已有的系统上，可以利用前向纠错编码而不耗费额外补偿，可以很自然地利用分区天线和自适应波束形成技术，易于频率管理，不易被检测和窃听而具有安全性。
With the development of the Digital Signal Processing technology and with the rise of the third generation mobile communication and broad-band CDMA, the Smart Antenna technology become a hot research point.
随着数字信号处理技术的发展和3G移动通信技术、宽带CDMA技术研究的兴起，智能天线在其中的应用也成了研究热点。
Due to the compact size and stringent cost of handsets and the limited battery capacity, there is a challenge for using the smart antenna technology in mobile terminals.
想要在小型的移动设备终端上使用一些移动通信的新技术，比如智能天线技术、多天线的技术，对天线阵列的尺寸也是一个挑战。
Keywords: Multiband antenna; Wide-band antenna; Small electrical size antenna; Mobile communication terminals
中文关键词：多频段天线；宽频带天线；电小尺寸天线；移动通信终端
Mainly focusing on monopole antennas and planar inverted-F antennas, this project intends to explore new antenna structures for mobile terminals by improving the feeding technique, the structure of the ground and the radiating elements of the antenna.
本项目以单极天线和平面倒F天线两种天线形式为主，通过改进天线的馈电方式、地、辐射单元等，探索了新的移动通信终端天线结构。
Based on the thorough analysis of the smart antenna theory and unlit-user detection, this paper introduces a space time detection scheme of embedding the smart antenna array into multi-user detection in CDMA mobile communication system. The main works of dissertion are as follows. First: The smart antenna array and the multi-user detection are analysed basically. At the beginning part of this thesis, the expression of the antenna array conceptually, the several vector optimization rule and adaptive algorithm of beamform are discussed and compared. The signal model and the performance estimate of multiuser detection are introduced. At last, the several algorithm of blind multiuser detection are analysed and compared.
因此，在对智能天线理论和多用户检测原理深入分析的基础上，本文提出了一种在码分多址移动通信系统中，将智能天线与多用户检测相结合的空时检测方案，本文主要工作概括如下：1、分别对阵列天线中波束形成和多用户检测进行了分析，首先从基本概念入手介绍了阵列天线的表达方法，讨论并比较了几个常见的最优权向量准则和自适应波束形成算法；接着对多用户检测的信号模型和多用户检测算法的性能测度做了介绍，最后介绍并比较了盲多用户检测的几种算法。
Fresnel Zone Plate antenna with high performance on wideband, lightweight, simple feed system and easy conformability, have been regarded as a replacement of the lens antenna in the millimeterwave imaging or used as the receiving element in microwave mobile communications.
菲涅尔平板天线由于其具有宽频带、重量轻、馈电简单和易于共形等优点，可替代透镜天线用于毫米波成像或用作微波移动通信中的接收天线单元等。
The achievements of this paper are:(1) It puts forward the BER computation method of PSK digital microwave communication of fading channel in interference circumstance; (2) It puts forward the methods of optimizing microwave antenna type, base station layout and frequency allocation to achieve sprctrum share; (3) Partly solve the difficulty of used frequency for developing DS-CDMA digital mobile communication in 2GHz.
本论文的主要研究成果为：(1)从理论上提出了存在干扰条件下数字微波通信系统衰落信道的误码率的计算方法；(2)提出了利用优化微波天线选型、基站布局和频率配置来实现频谱共用的方法；(3)部分地解决了发展我国2GHz DS-CDMA数字移动通信事业频率紧张的矛盾。
A machine of the Motorola 8989 dual-card mobile phone and car fax machines and a good signal outside antenna; -board computers equipped with wireless network card can be realized after the mobile Internet, and equipped with wireless keyboard and wireless mouse.
一机双卡的摩托罗拉8989车载电话和车载传真机以及信号不错的车外天线；车载电脑在配置了无线网卡后即可实现移动上网，而且配有无线键盘和无线鼠标。