The calculation method for dynamic stochastic-wind load was set up for large-diameter antenna structure.
建立了大口径天线结构随机风荷动力的计算方法。
Secondly, we examine the COBRA with segmented parabolic reflectors. The design of the reflector is re-expatiated, which is composed of several equivalent parts of parabolic reflector with the same axis and focus. The radiation formulas are deduced with Current Distribution Methods, and the radiation patterns are calculated. The results show that it can produce high-gain circularly polarized field in the boresight direction (the gain is about 30dBi when the diameter of the reflector is 1.3m) and its 3dB bandwidth is 78%. The radiation formulas of TEM coaxial mode as the radiation mode of COBRA are also deduced. At last, a new folding antenna has been put forward and designed.
在COBRA天线方面：重新阐述了反射面的设计公式，该反射面是几块不同焦距抛物反射面的共焦共轴组合；用电流分布法推导了天线的辐射公式并编写了计算程序，利用该程序对天线的辐射方向图和频带宽度进行了讨论，计算表明这种天线可以在轴线上获得高增益的圆极化波(当反射面直径为1.3m时增益为30dBi)，其3dB带宽为78％；推导了同轴TEM模作为COBRA天线馈源时的辐射公式；最后，提出并设计了一种折叠式COBRA天线。
The main console has the receiver (with pre-amplifier on top), A-scope, and related controls on the left, antenna control module on the right, and a large, 15-inch diameter PPI scope in the lower unit.
主控台有接收机A显示器及相关控制键在左，天线控制组件在右，直径15英寸的PPI显示器在下方。
Inspected structure of alkyl of oxygen of silicon of hydrocarbon of diameter of bead of collosol of 2 oxidation silicon, alkyl and chroma and black to wash the influence of antenna of frequency butt joint, use scanning electron microscope, the exterior configuration that arranges around dacron fabric to collosol of 2 oxidation silicon undertakes comparative.
考察了二氧化硅溶胶粒径、烷烃硅氧烷结构和浓度及皂洗次数对接触角的影响，并利用扫描电子显微镜，对二氧化硅溶胶整理前后涤纶织物的表面形态进行比较。
A fitting metal and a contact part of a rod antenna guide are spaced apart from each other at a predetermined distance or the rod antenna guide has an inner diameter enough to rotate the fitting metal at a predetermined angle.
金属配件和杆状天线导向器的接触部分彼此分开预定距离，或杆状天线导向器具有的内径足够大，允许金属配件旋转预定角度。
The paper studies the pointing control problem of flexible antenna which has large size (diameter from several meters to tens of meters) and requires high pointing accuracy (005 °).
论文从工程实践角度探讨了具有大尺寸（直径几米～几十米）和高精度（0.05°）的挠性天线指向控制问题。
From engineering practice, the paper discusses the flexible antenna pointing control problem in momentum bias system which is widely used. The flexible antenna has large size (diameter from 3m to 5m) and requires high pointing precision (005 °).
从工程实践角度，探讨了在目前广泛采用的偏置动量轮三轴姿态稳定卫星上，进行大尺寸（3～5m）和高指向精度（0.05°）的挠性天性指向控制问题。
The result shows that this antenna is characterized by its small height easily mounted on the top of the car, 50 Ω feeder line without a matching network after the proper selection of the height and wire diameter, great radiation resistance and high efficiency.
只要选择天线高度和导线直径即可实现与50Ω馈线匹配而不需要匹配网络；具有较大的辐射电阻和较高的效率。
The 50m-diameter radio telescope antenna structure consists of a pedestal and a reflector.
50m口径射电望远镜天线结构主要由座架和反射体等组成。
How to improve the in-orbit performing accuracy and stability of large-diameter satellite antenna is a major problem.
如何提高大口径星载天线在轨运行时的精度及稳定性是现今存在的一大难题。
Experimental study of a new type of internally cooled microwave antenna in liver coagulation: relationship of short-axis diameter of necrosis, time and power
新型内冷微波天线离体肝组织凝固实验&凝固灶短轴径与时间、功率的关系初探
Then it changes into an unrestricted goal function through adding to the penalty function and gets a set of the external diameter values of the coaxial configuration which can match well with the antenna by optimization.
通过加入罚函数将其转化为无约束目标函数，并优化得出一组使天线匹配良好的同轴线结构外径值。
The large-diameter transmitting antenna measurement system of laser atmospheric experiments is designed. The expander and drift experiments in the atmospheric turbulence are carried out at different laser focal lengths.
在理论分析的基础上对扩展和漂移的测量方法进行了论证并改进激光大气实验测量系统，设计大口径发射天线以便开展不同聚焦半径下的湍流扩展和漂移实验。
The simulation shows that, under the optimal conditions, the power penalty induced by space optical coupling of receiver is less than 2 dB when the product of receiving antenna diameter and the rms pointing error of receiver is less than 0.15 waves.
仿真表明：在最优条件下，当接收天线直径与接收端瞄准误差标准差之乘积小于0.15个波长时，由接收端空间光耦合引起的功率损失小于2μrad。
Based on the electromechanical coupling property of large spaceborne developing antenna, the article shows an analysis of the structural-thermo-electromagnetic coupled problem of a large spaceborne deployable paraboloid antenna with the diameter of 12m and 108m, with the sequence coupling analysis method.
基于大型星载可展开天线的机电耦合特性，采用顺序耦合的求解方法对口径为12m和108m的星载抛物面天线进行了结构热电磁耦合初步分析。
The Retro-reflective targets and coded targets were applied successfully in detecting shapes of an antenna with a diameter of 17.2m loaded on a satellite and another lager one with a diameter of 50m.
将回光反射人工标志成功应用于天线面型检测中，通过17.2米某星载天线与50米口径天线测量，验证了编码标志在自动化测量中发挥的重要作用。
Using the optical technique to measure the shape of large-diameter deployable antenna can achieve the non-contact measurement fleetly and can present the real-time and quasi-real-time measurement result with high precision.
利用光学测量手段对大口径天线反射面进行形貌测量，可实现快速无接触测量，能够实时、准实时地给出高精度测量结果。
To be able to transmit on these loops you`ll have to follow stringent design rules in order to maximize the efficiency of the loop. If you`re interested in a receive-only loop, then the design rules become very relaxed. There`s no need for large diameter tubing and neither for a low loss capacitor to successfully build a loop antenna.
那些磁环天线是为了使发射效率最大化，你要做的话就要严格按要求做，假如你只是为了接收，那么设计规则就比较松了，既不需要一个大直径的管材，也不需要一个低损耗的电容器来成功地做一个磁环天线。
Due to its wide operating frequency range and its restricted antenna aperture by missile diameter, the angular resolving power of ARRS is limited.
由于导引头具有很宽的工作频率范围，天线孔径尺寸受弹径限制，因此导引头的角分辨率低。