由于受单天线的方向性限制，采用传统的天线模式不能实现对旋转飞行器连续跟踪测量。
Continuous tracking of a rotating spacecraft in conventional antenna modes is not possible because of the pattern constraints of a single antenna.
实验表明，多层前传神经网络模型可以有效地对天线的方向性图进行建模，可用于天线的计算机辅助设计（CAD） 。
The experiments show that the multi_layer feed forward neural networks can model the radiation patterns of the antennas efficiently and are suitable for the CAD of antennas.
多层介质天线罩对机载天线低副瓣性能有显著的影响，对带罩天线的方向性进行一体化分析有助于机载天线的优化设计。
Multilayer radome will exert a tremendous influence on low sidelobe antenna pattern. Integrated directivity analysis of antenna with radome will be helpful to airborne antenna optimization design.
模拟结果表明，天线阵的方向性以及增益都得到了加强。
Simulated results show that the directivity and the gain of the array are improved.
那种天线可接受没有方向性的信号。
然后研究谐振腔天线一些参数的对其频带和方向性的影响。
The third part is about the research on the improvement of the directivity of antennas using wire medium.
本文研究了方向性天线对DSR路由协议性能的影响。
The effect of directional antenna on the performance of DSR routing protocol is studied in this paper.
文章以高方向性天线及光子晶体微带传输线为例，综述了光子晶体在微波技术中的研究进展。
The application of photonic crystals in microwave devices, especially in high directive antennas and photonic bandgap microstrip structures, is reviewed.
选用方向性好、增益高、旁瓣低的角形反射器天线作为本论文的研究重点。
The emphasis in this paper was corner reflector antenna with high-gain, narrow beam and low side-lobe.
最后计算用沃尔什电流加权激励的天线阶的方向性。
The directivity of in array excited by weighted Walsh current has also been calculated.
毫米波介质透镜天线是一种高方向性的口径天线。
Millimeter-wave dielectric lens antenna is a kind of aperture antenna with high directivity.
自行研制的复合阵列天线具有增益高、方向性图尖锐、抗干扰能力强的特点。
The composite arrayed antenna has the characteristics of high gain, sharp directionality and strong anti disturbance ability.
在微波暗室静区反射电平计算时常采用点源发射模型模拟天线的特性，它适用于低频段或方向性差的天线。
In calculation of reflected level of quiet zone in anechoic chamber, a spot emission model is often used to simulate antennas characteristic.
为了有效地利用定向天线的空分复用的特点，同时减少由于其方向性带来的一些影响，需要提出一种新的无线MAC协议。
In order to effectively use directional antenna space division multiplexing features, while reducing some of its directional influence to bring the need to propose a new wireless MAC protocol.
采用遗传算法来优化单脉冲阵列天线的和、差方向图和方向性系数。
The sum and difference patterns as well as the directivity of the monopulse antenna arrays are optimized based on genetic algorithms (GA).
导出了用天线方向图的半功率波束宽度快速计算口径天线方向性系数和增益的简单表达式，分析讨论了这些公式的应用范围。
The simple formulae of fast calculating aperture antenna directivity and gain are derived using antenna beamwidths. Applied range of these formulae are analyzed and discussed.
本文对均匀直线阵列天线在相控扫描过程中的主瓣宽度和方向性系数进行了估算。
In this paper, the main valve width and directive gain for uniform linear array of antennas in phased scanning are estimated.
本文利用天线阵基本原理近似分析了曲线振子的方向性系数，得到了方向性系数随曲线振子长度的变化关系，为曲线振子天线的进一步研究及设计提供参考。
The directivity of curvilinear dipole is analysed by the basic principle of antenna array, the relationship between the directivity and the length of curvilinear dipoles is obtained.
利用该方法得到的圆形超方向性天线阵可以在较小的空间内实现比普通线形天线阵列更好的方向特性。
The Supper directive synthesis of circle arrays can result in better directive performance than general line arrays of the same size.
本文简要地介绍了曲面及直劈几何绕射理论(GTD)在计算天线方向性中的应用。
In this Paper, a summary of Geometrical Theory of Diffraction (GTD) by a curved surface and a straight wedge, and its application to calculation of antenna pattern is given.
采用口径场绕射积分求取了天线的近场及远场方向图，绘制了波束宽度、方向性和最大副瓣电平三个关键参数随场点距离的关系曲线。
Three key parameters, namely beamwidth, directivity and maximum sidelobe level, are drawn versus the distance between field points and the center of aperture.
最后计算用沃尔什电流加权激励的天线阶的方向性。
The directivity of in array excited by weighted Walsh current has...
给与渴望得到的方向性特征的天线排列。
Wind forces will have a series of circles drawn showing direction and range of the force.
给与渴望得到的方向性特征的天线排列。
Wind forces will have a series of circles drawn showing direction and range of the force.
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