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phased array
相关语句
  相控阵
     Study of Reduced-Rank STAP for Airborne Phased Array Radar
     机载相控阵雷达降维STAP研究
短句来源
     Research on SAR Auto-focusing Space-borne ScanSAR Image Processing and SAR Active Phased Array Design
     SAR自聚焦,星载ScanSAR成象和有源相控阵天线研究
短句来源
     Airborne Phased Array Radars Simulator System Design and Realization Research
     机载相控阵雷达模拟器系统设计与实现研究
短句来源
     Research on Resource Management Technology for Phased Array Radar and Its Network in Tracking System
     相控阵雷达及组网跟踪系统资源管理技术研究
短句来源
     Study on STAP for Phased Array Airborne Radar in Nonhomogeneous Environment
     非均匀环境下的相控阵机载雷达STAP研究
短句来源
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  相控阵天线
     Phased Array Design and Analysis for OSMAR2000
     OSMAR2000相控阵天线的分析与设计
短句来源
     X-BAND RECTANGULAR WAVEGUIDE PHASED ARRAY ANTENNA
     X波段矩形波导相控阵天线
短句来源
     Study of Millimeter Wave Phased Array Antenna
     毫米波相控阵天线研究
短句来源
     Tolerance Analysis of Planar Phased Array Antenna
     平面相控阵天线容差分析
短句来源
     Structural Design of Phased Array Antenna for Weather Radar
     气象雷达的相控阵天线结构设计
短句来源
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  相控阵列
     Analysis of 1.25D, 1.5D and 1.75D ultrasonic phased array focused acoustic field
     1.25D、1.5D和1.75D超声相控阵列聚焦声场分析
     Study of Optical Switch Crosstalk and Its Influence on Optically Controlled Phased Array Radar System
     光开关串扰及其对光控相控阵列系统的影响研究
短句来源
     Theoretical analysis and simulation of instantaneous bandwidth for optically phased array antenna
     光控相控阵列天线瞬时带宽的理论分析与仿真
短句来源
     All the parameters of high intensity focused ultrasound phased array may effect the performance and cost of the ultrasound therapeutic system.
     高强度聚焦超声相控阵列的诸多参数直接影响着该系统的性能和制作成本 .
短句来源
     Analysis of segmented annular ultrasonic phased array focused field
     分割环形超声相控阵列聚焦声场分析
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  “phased array”译为未确定词的双语例句
     Design of Bi-dimensional Phased Array for 250kHz Doppler Speed Log
     250KHz多普勒计程仪二维相控基阵设计
     Study and Design of Control System of Phased Array Vibroseis
     相控可控震源控制系统的研究与设计
短句来源
     The influence of random initial phases on the phased array antenna pattern is derived from the basic definition of the power spectrum in the paper.
     本文从功率谱的基本定义出发,导出了随机初相对天线方向图的影响。
短句来源
     Analysis of Surface Planeness Error of Slotted Waveguide Phased Array
     波导缝隙相阵天线阵面平面度误差分析
短句来源
     The most promising demultiplexer in DWDM system,Phased Array(PHASAR),is introduced.
     综述在密集波分复用系统里最富前景的 PHASAR(Phased Array)解复用器。
短句来源
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  phased array
In this paper, the near-field vector components were used to combine the FEM method and the uniform-geometrical theory of diffraction (UTD) method for analyzing phased array antenna mounted on an airborne platform.
      
A Parametric Study of Beam Steering for Ultrasonic Linear Phased Array Transducer
      
All the parameters of a linear phased array may affect the performance and cost of the ultrasonic inspection system.
      
A mathematical model was presented to simulate the characteristic of an acoustic field radiated from an ultrasonic linear phased array on the basis of Huygens' principle.
      
The effect of an irregularity of the element distribution in a two-dimensional phased array upon the efficiency of heating of biological tissue is studied in an ultrasonic surgery regime.
      
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The paper includes two parts. The first part is a theoretical part, in which the characteristics of holography as applied to detection is discussed, and the notion of "detecting holography" is proposed. The principal difficulty encountered in applying elastic or electromagnetic waves to the earth media is the poor longitudinal resolution of monochromatic holography. Prom the viewpoint of the communication theory and the antenna array theory, the monochromatic holography is examined, and its relations to correlation...

The paper includes two parts. The first part is a theoretical part, in which the characteristics of holography as applied to detection is discussed, and the notion of "detecting holography" is proposed. The principal difficulty encountered in applying elastic or electromagnetic waves to the earth media is the poor longitudinal resolution of monochromatic holography. Prom the viewpoint of the communication theory and the antenna array theory, the monochromatic holography is examined, and its relations to correlation detection, matched filters as well as phased array anteenas are illustrated. Multifrequency synthetic detective holography is developed as a possible approach to the solution of longitudinal resolution problem. Its principles are discussed, its relations to the "impulse holography" and the formulas for the longitudinal resolution are deduced. Finally, examples of two-dimensional computer simulation are presented to illustrate the feasibility of the method.The second part is an account of experiments made in water-tank for the microwave multifrequency synthetic detecting holography. The results of computer reconstruction using interference-type holograms give evidence to prove the high resolution and good imaging quality of the method.

本文分两个部分。第一部分从理论上探讨了全息成象应用于探测时的特点,提出了“全息探测成象”的概念。指出对地层介质使用弹性波或电磁波时,关键问题是纵向分辨力低。作者从信息论和天线阵理论的观点探讨了单频全息成象,研究全息成象和相关检测、匹配滤波以及相控阵之间的联系,提出了多频合成全息探测成象作为解决纵向分辨力的一个方法。探讨了它的原理,指出了它和“脉冲全息成象”的关系,导出了纵向分辨力公式,并给出了二维理论模型计算的结果,以说明方法的可行性和应用前景。 第二部分为实验部分,叙述了多频合成微波全息探测成象的试验。采用二维干涉型全息图做了简单模型的水槽试验,由计算机成象的结果证实了多频合成法的高分辨力和良好的成象质量。

"Blind spots" is a well known phenomena occuring in the operation of the phased array "blind spots" means total reflection of input power Either of two conditions leads to total reflection, null of the radiation resistance or infinity of the admittance. This paper is to investigate these conditions. Through detail mathematical analysis, it is concluded that the null of the radiation is the only reason to cause total reflection i.e. ''blind spots" . Besides, approximate conditions for existence of the null...

"Blind spots" is a well known phenomena occuring in the operation of the phased array "blind spots" means total reflection of input power Either of two conditions leads to total reflection, null of the radiation resistance or infinity of the admittance. This paper is to investigate these conditions. Through detail mathematical analysis, it is concluded that the null of the radiation is the only reason to cause total reflection i.e. ''blind spots" . Besides, approximate conditions for existence of the null of the radiation resistance are give. We have also obtained some results different from those published in foreign literatures.

本文利用积分方程近似解方法,对平面相控阵天线的“盲点”进行了分析。分析结果表明,产生“盲点”(假如确实存在的话)是由于天线输入电导趋于零所致。文章还对国外文献的提法提出了不同的看法。最后本文还分析了天线输入电导趋于零所需要的一些条件。

By adjusting phase setting in phase shifters, sidelobe level of the pattern of phased array antenna can be reduced. Such is the phase weighting method d?scribed in the paper. Its basic concepts and theoretical analysis have been described and comparison has been made with density-weigh ting method. Also two examples have been given.

本文提出了降低相控阵天线副瓣电平的一种方法——相位加权法。它仅需在数字移相器上改变单元的相位,来降低天线副瓣电平,不必采用密度加权。文中给出了降低副瓣电平的基本思想和理论分析,并与密度加权做了比较。最后给出了两个算例。

 
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