Antenna system noise temperature and antenna efficiency are the most important items in the system debugging and checking before the VLBI observation.
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。
Heterodyne efficiency is reduced by aberration of receiving antenna for space coherent optical communication.
空间相干光通信中接收天线像差会使光外差效率下降。
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.
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 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.
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。
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.
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。
The high temperature superconductors (HTS) bearing low surface resistance can be used to raise the efficiency of antenna.
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。
This paper chooses a normal mode helical antenna to replace the short dipole antenna to improve efficiency.
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。
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.
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。
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.
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 general trailing antenna have some disadvantages, such as large noise, low efficiency and shallow communication death so on.
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。
Efficiency and gain of a parabolic antenna directly depend on the degree of accomplishing of these demands.
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。
To use space mapping algorithm optimizing the position of the antenna, it can highly enhance the operation efficiency.
运用空间映射算法优化天线阵的位置参量，可以大大提高运算速率，节省时间。
In order to meet the requirements of test to antenna elements of airborne radar, and to enhance the working efficiency, design a new test scheme is needed.
为了满足批产雷达天馈单元的测试要求，提高工作效率，需要设计一种新的测试方案。
In microwave communication, the conventional theodolite method for antenna azimuth calibration is of large error and poor efficiency.
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。
The adjustment of pointing and polarization Angle of satellite receiving antenna directly influences the receiving efficiency.
卫星接收天线的指向和极化倾角的调整是否准确，直接影响到接收的效果。
The experimental results show that the measurement obtained is apparently improved, and the antenna gain greatly increased, therefore the efficiency is more close to that by the far-field measurement.
通过实验比较，使用微波透镜后测试结果明显改善，天线增益明显提高，使近场测试的结果更接近于远场测试的结果。
In this paper, the equations for calculation of the radiation performances on high efficiency double reflector antenna fed by beam waveguide are derived.
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。
Based on this exasperate antenna performance, a new rectifier with high power conversion efficiency and low turn-on voltage is presented.
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。
The small electrical antenna is characteristic of a low input impedance and a low efficiency.
传统的电小天线其特点是低输入电阻和低效率。
MIMO relay channels, which combines the multiple antenna system and the relay, can improve the spectral efficiency of relay network.
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。
The advantages of the antenna are: firstly, receiving two kinds of polarized digital video signals with high 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；
That type of antenna has the advantages of simple structure and high efficiency.
这类天线的优点是结构简单，效率高。
Antenna have high gain, low noise temperature characteristic under test in experimentation, and it can precision tracking at S-band, high efficiency receive at S/X-band.
经过外场测试，天线在S/X双频段具有高增益、低噪声温度的优良性能，天馈系统在S波段能进行精密跟踪及S/X双频高效率接收。
Adaptive antenna array is an approach that shows real promise for increasing spectrum efficiency.
阵列天线是提高频谱利用率一种可实现的方法。
Adaptive antenna array is an approach that shows real promise for increasing spectrum efficiency.
阵列天线是提高频谱利用率一种可实现的方法。
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