本文讨论场相关定理用于计算反射面天线效率的两种不同公式。
This paper describes two different formulae of the field correlation theorem for the calculation of the efficiency of reflector antennas.
因此本论文利用回声实验室做天线效率评估，开发出两版回声实验室。
Therefore, this thesis attempts to develop reverberation chambers to evaluate antenna's efficiency.
同抛物面反射器相比，菲涅尔区相位修正平面反射器的相位效率因子对天线效率的影响显著。
Compared with the parabolic reflector, a phase factor is of most importance in the efficiency evaluation of Fresnel zone phase-corrected plate (FZP) ones.
在流动vlbi的观测试验中，天线系统噪声温度和天线效率是观测前系统调试和检测的两项重要内容。
Antenna system noise temperature and antenna efficiency are the most important items in the system debugging and checking before the VLBI observation.
为提高辐射效率和扩展工作带宽，对一种口径耦合馈电的多层介质高温超导微带天线进行了设计。
To increase the radiation efficiency and broaden the operation bandwidth, an aperture-coupled microstrip antenna of high temperature superconductor with multi-layer substrates is designed.
空间相干光通信中接收天线像差会使光外差效率下降。
Heterodyne efficiency is reduced by aberration of receiving antenna for space coherent optical communication.
在微波通信中，天线方位角的校准通常采用经纬仪法，存在误差大、效率低的缺点。
In microwave communication, the conventional theodolite method for antenna azimuth calibration is of large error and poor efficiency.
应用此模型，并结合分层介质中的并矢格林函数，分析了贴片天线的辐射阻抗、空间波辐射效率等特性。
Using this model and the relevant dyadic Green's function, some characteristics of a rectangular patch antenna near resonance, such as radiation resistance and space wave efficiency, are analysed.
电-磁振子组合型UWB天线集电振子和磁振子于一身，具有尺寸小、辐射效率高的特点。
The electric-magnetic vibrator combined UWB antenna (EMV-UWB) that constructed of electric and magnetic vibrator, has the characters of small size and high radiated efficiency.
这类天线的优点是结构简单，效率高。
That type of antenna has the advantages of simple structure and high efficiency.
阵列天线辐射单元采用空气介质的微带贴片天线，辐射效率高；阵列天线的馈线网络采用低损耗的空气带状线形式，降低了馈线损耗。
The radiating element of array antenna is air dielectric microstrip patch antenna, which has high efficiency, and the feed network is low loss air strip, which can reduce the loss of the feed line.
线性MMSE检测子的峰值频谱效率与发送天线数有关，随发送天线数的增加而减小，随接收天线数的增加而增大。
The peak spectral efficiency of MMSE detectors decreases as the number of transmission antennas increases and increases as the number of receiving antennas increases.
近场天线测量中，采用大的采样间隔，有利于提高测试和数据处理的效率。
The larger sampling spacing is advantageous to enhance the measurement and data processing efficiencies for near field antenna measurements.
本文采用法向模螺旋天线代替以前采用的短偶极子天线以提高效率。
This paper chooses a normal mode helical antenna to replace the short dipole antenna to improve efficiency.
抛物面天线的效率和增益完全取决于实现这些要求的程度。
Efficiency and gain of a parabolic antenna directly depend on the degree of accomplishing of these demands.
本文讨论了矩形脉冲激励的对称驻波天线的能量方向图、总辐射能量、辐射效率和辐射电阻等问题。
The energy pattern, total radiation energy, radiation efficiency and radiation resistance of standing-wave dipole excited by rectangular pulse are discussed.
开发的天线测调软件可以大大提高天线面板的安装调整效率和装配精度，具有广阔的工程应用前景。
The software developed can improve the efficiency and accuracy of the alignment and adjustment of antenna panels. It should have a potential application prospect in engineering fields.
在相控阵天线的全部可能配相中寻找某些特殊的配相控制，就能够简化线性模型的求解，从而提高天线测量的效率。
Some special controls can be found hi all the possible disposing-phases to simplify the solution of the linear model, thus increasing the research efficiency.
高温超导(HTS)体由于具有较低的表面电阻，在天线应用中，它可以提高天线的效率。
The high temperature superconductors (HTS) bearing low surface resistance can be used to raise the efficiency of antenna.
由于纳米管内电子运动固有的弹道输运效应，使得纳米管阵列天线具有辐射效率高的优点。
The intrinsic ballistic transportation of electrons in nano-tube makes it possible for antennas consisting of nano-tube array to radiate with higher efficiency.
本文导出了地面站常用的改进型波束波导馈电高效率双镜天线的辐射特性的计算式。
In this paper, the equations for calculation of the radiation performances on high efficiency double reflector antenna fed by beam waveguide are derived.
常规拖曳天线通信存在噪声大、效率低及通信深度浅等缺点，从而严重影响潜艇战斗性能的发挥。
The general trailing antenna have some disadvantages, such as large noise, low efficiency and shallow communication death so on.
为了提高相控阵天线的检测效率，本文采用了相控阵天线换相测量法。
In order to improve the test efficiency of phased array antennas, phase-shift measurement method is adopted in this paper.
考虑到单线圈天线的性能降低，设计了一个新的具有高效率低启动电压的电荷泵整流电路。
Based on this exasperate antenna performance, a new rectifier with high power conversion efficiency and low turn-on voltage is presented.
MIMO中继技术结合了多天线系统和中继技术的优点，进一步提高了中继系统的频谱效率。
MIMO relay channels, which combines the multiple antenna system and the relay, can improve the spectral efficiency of relay network.
一种在某些特定的方向上可以更高效率地发射和接收无线电频率(RF)信号的天线。
An ANTENNA that radiates or receives RADIO FREQUENCY (RF) signals more efficiently in some directions than in others.
传统的电小天线其特点是低输入电阻和低效率。
The small electrical antenna is characteristic of a low input impedance and a low efficiency.
这种天线的优点是，一、可以较高效率地接收两种极化的数字电视信号；
The advantages of the antenna are: firstly, receiving two kinds of polarized digital video signals with high efficiency;
由于双脊喇叭天线不仅具备超宽带特性，还具有体积小、增益和口径效率高等优点，因此本文选双脊喇叭天线作为所要设计的超宽带天线。
Since the double-ridged horn antenna owns many seductive characteristics, such as ultra broadband, relatively small size, high calibre efficient and gain etc.
将电场积分方程和矩量法相结合，可得到一种处理任意形状天线的高效率数学方法。
By combining the electric-field integral equation with the moment method, an efficient numerical procedure for treating the problems of wire antenna with arbitrary shape can be developed.
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