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我用的是三波段五单元定向天线。I am using a three-band five-element beam.

自己动手做2.4G无线网络定向天线！Do-It-Yourself 2.4G wireless networks to do directional antenna!

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在无线通信技术中，定向天线以某一波瓣辐射的电磁能。In radiocommunications, the radiation in a lobe of a directional antenna.

定量分析了载体的横纵摇对天线指向的影响，为定向天线转台采用一维形式提供了依据。The quantitative influence caused by the pitching and rolling of the motion ship is analyzed.

我真希望别的那些有定向天线和很多操作员的远征可以象你表现得一样出色。I only wish that other Expeditions with beams and many operators could do the fB job that you did.

利用定向天线，这种设备发射数据到远在60英里外的接收天线。Using a directional antenna, the device shoots data to a receiving antenna as far as 60 miles away.

横列定向天线是一组安装平面反射器的平行偶极天线，通常是线形或平面状排列的。Billboard Antenna is an array of parallel dipole antennas with flat reflectors, usually positioned in a line or plane.

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RVT连接到一个定向天线接受来自飞行器的信号，飞行距终端一直达40公里。The RVT is connected to a directional antenna to receive signals from the air vehicle flying up to a range of 40km from the terminal.

中波天线大部分采用铁塔天线，非特殊地形或特别要求的服务区外，均采用不定向天线。While mid-wave antenna is mostly iron tower antenna, we do not use directional antenna except that we need special service in special area.

自定向天线是一个崭新的研究方向，它不仅可以降低射频前端系统的成本，而且可以简化数据处理过程。Being a new field of research, retrodirective antenna not only saves the cost of RF front-end system, but also simplifies the data processing.

除此之外，拓扑控制还可以通过信道分配、调整定向天线方向等技术实现。In addition, topology control can also be realized by the technology of channel allocation and adjust the direction of directional antennal, and so on.

在一定的界限范围内，固定横列定向天线的瓣可以被相应的、发送给排列单个元素的合适的相位调整来控制。The main lobe of a fixed billboard antenna may, within limits, be steered by appropriate phasing of the respective signals to individual elements of the array.

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随着移动通信的迅速发展，自定向天线技术的研究不仅有着重大的理论意义，而且具有巨大的现实意义和实际应用价值。With the rapid development of mobile communication, the research of retrodirective antenna technique will present significant value both in theory and practice.

本文是为了解决定向天线的相位中心问题，为侦测合一系统设计提供参考而展开研究的。This paper is worked to solve the phase center of the directional antenna, accordingly to giving some references for the interception and Direction-finding system.

在这种情况下，通常还不知道其它用户的扩频码和数据信息时，利用定向天线的空间分割方法是减小多址干扰的简单有效措施。Considering that spread sequences and data of other users cannot be also attained, the space division receiving could be a simple and effective method to reduce MAI.

室内挂墙定向天线一般用于天花不便安装、长条型走道、电梯井等场所。The indoor wall-mounted antenna is usually installed in the ceiling and not convenient to be installed in locations such as the long-narrow walkway and elevator well.

然后设计、提出了基于定向天线的适用于机间数据链的时隙分配算法及路由协议并利用OPNET仿真软件验证了网络性能。And then time slot allocation algorithms and routing protocols based on directional antenna are designed for IFDL. At last performance of the network is simulated with OPNET.

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文章以GPS定位技术、直流伺服技术为基础，研究设计一套能够对移动目标实行自动跟踪的定向天线控制系统。Tht article GPS positioning technology, DC servo technology, research and design a set of moving targets can implement automatic tracking of the directional antenna control system.

如果船舶EGC接收设施与INMARSAT移动站共同使用一个定向天线，则只能接收由SES正在跟踪的卫星所播发的海上安全信息。If the ship's EGC receive facility shares a directional antenna with an INMARSAT MES, only the MSI broadcast through the satellite which is being tracked by the MES will be received.

针对定向天线和无线信道的特点，有许多基于定向天线的接入控制协议被提出来，以实现信道的空分复用。For the directional antenna and wireless channel characteristics, there are many directional antenna based access control protocols have been proposed to achieve channel spatial reuse.