天线阵

The Airy function is used to calculate the plasma impedance and the grill-plasma scattering matrix is deduced, then the coupling properties of the HT-7 LHCD MJ launcher are studied with the antenna scattering matrix and the grill-plasma scattering matrix based on the liner coupling theory. The average power reflection coefficient, directivity, power spectrum are obtained for different edge plasma densities and for different phasings between main waveguides.

采用线型耦合理论，用艾黎函数计算了等离子体阻抗，推导出常规波导阵对等离子体的散射矩阵，并利用它和天线自身的散射矩阵研究了HT-7装置低杂波多结波导阵天线的耦合特性；计算了其平均功率反射系数、方向性系数和功率谱与等离子体边缘密度和主波导相位差等参数的关系。

Deficiently, only ordinary antennas are studied here, circular array and cylindrical array, for example. Farther study about complex and anomalous conformal antennas is expected.

不过，本文中只对简单形式的共形阵天线，如圆形阵、圆柱面阵天线进行了分析，复杂的不规则的共形阵天线的情况还有待于进行进一步的研究。

First, based on phased array antenna's mono-pulse goniometry and separate coordinate technology about phase control, the antenna beam pointing error formula, caused by phase quantization error, is derived from linear array and circular array to planar array and cylindrical array.

首先以单脉冲相控阵天线测角原理为基本理论出发点，利用相位控制的坐标分离技术，基于线阵、圆形阵等简单形式的相控阵天线，推导了平面阵、圆柱面阵等相控阵天线由相位量化误差引起的波束指向误差公式。

The performance of the vector modulator is proved by experimental results. In addition, applications of the vector modulator in practical systems such as adaptive antenna array are presented, with its calibration method to improve carrier and sideband suppression.

最后给出了矢量调制器的测试结果和它在自适应天线阵等实际系统中的应用情况，并讨论了用于提高载波和边带抑制、满足高精度要求的校准方法。

MUSIC algorithm is the basis of the method of direction finding with space spectrum estimation.

MUSIC算法是空间谱估计测向的基础，它是通过天线阵对被测信号的响应矩阵来解算信号方向的。

FPGA-based implementation of LMS algorithm is one of the key techniques in the application of adaptive array antennas .

LMS算法的FPGA实现是自适应天线阵用于实践的关键之一。

The superior properties of antenna arrays composed of unequal dipoles are discovered and the method to modify the length of each element is described.

研究了由不等长的偶极子组成的天线阵的优越性，提出了调节偶极子的长度以达到设计目的的方法。

In view of the development about the certain airborne radar antenna array,considering the structural features of antenna array,analyse the cruces in manufacturing of feed cavity and radiant plate,and present the corresponding solution by mainly dealing with precise positioning style,delicate clamp design,error distribution and compensation method,high speed machining technology design,machining simulation and program optimizing.

某机载雷达平面裂缝阵列天线的单面阵如图1所示。该面阵布置多路裂缝线源，共分布384处长度各不相同的辐射裂缝，每一路线源均由脊型波导口单独馈电。面阵由辐射板和馈电腔两个零件组成，采用整体钎焊成形。线源结构为非对称单脊共线形式，即在普通单脊波导的两侧与辐射裂缝相对应的位置上布置不对称的凹台。

Firstly, in contrast to the dipole resonator, the folded dipole resonator is used to improve the frequency responses. Secondly, two types of folded Yagi-Uda arrays are fabricated, one is the original array with uniform length and spacing, the other is the optimum array with perturbed length and spacing to obtain a higher directivity gain.

首先，应用摺叠式耦极谐振器取代原有耦极谐振器以改善频响应，接著设计组摺叠式Yagi-Uda阵天线，一是保持均匀长与间距的初始阵，一是微调长与间距的优化阵，以得到较高的方向增。

A new method for pattern synthesis of linear array with arbitrary geometric conf iguration is presented.

提出了一种适用于具有任意几何参数的线天线阵方向图综合的新方法。

I'm strongly against the death penalty — it's an eye for an eye.

我不赞成死刑——这是以牙还牙的报复行为。

And to get you the support you need, we're enlisting all elements of our national power: our diplomacy and development, our economic might and our moral suasion, so that you and the rest of our military do not bear the burden of our security alone.

并给你们所须的支援，我们正徵召国家所有各种的力量：我们的外交及发展，我们的经济力量与道德劝说，所以你们与其他军人不须要孤独地负起国家安全的责任。