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- Technical specifications are all satisfied within required wide frequency range, which include VSWR, main beam width, sidelobe level, gain, and the mutual relation of sum and difference patterns, etc. 在较宽的频带内,对于驻波比,主瓣宽度,旁瓣电平,增益,和 与差方向图对应关系等都得到了满足。
- main beam width 主波束宽度
- By applying "slit method",the beam width of THz wave was measured. 利用“狭缝法"测量了太赫兹光束的束宽。
- In case of electronic scanning the beam width is broader by a factor of two . 电子扫描时,波束宽度展宽一倍。
- It is important to eliminate or degrade the effect caused by the beam width of echo sounders and reflect the true seabed. 为提高海底地形的测量精度,应消除或减弱波束角效应影响。
- With the help of statistic principle, the estimtion ormulas ofthe antenna gain loss, beam width and siedlobe level in sparse array are derived. 应用概率统计原理,导出了具有幅相误差、元失效时稀疏阵天线阵增益损失、束宽度、向、瓣电平的估计公式、得出一些有益结论。
- The crane is connected with the main beam through its under-frame and the truck chassis. 起重机通过其底架与汽车底盘与大梁连接。
- Luminaire designed to be suspended from a cable with its main beam axis at right angles to the axis of the road. 利用电缆进行悬挂的灯具,其主光轴与道路主轴成直角。
- The main beam of the roof of this palace built in the Ming dynasty was made of precious wood. 这座明代宫殿的房柁用的可是名贵木材。
- When the initial power equals the critical power, a stabile spatial soliton is obtained, and generally the beam width takes periodical contraction or diffraction. 当初始功率等于临界功率时,可以得到一个稳定的空间孤子,而一般情形下,束宽则作周期的压缩或展宽变化。
- The extended part is internal frame, which is pushed by hand to orbit for sending or receiving cargos inside main beam. 伸出部分为伸缩板,手推使之在固定横梁内沿轨道运行接送货物。
- Results are satisfactory. this method can be applied to multibeam synthesis for arbitrary set of nonuniform elements, as well as beam width stretch and sector shaped beamforming. 该方法可用于任意单元构成的不均匀阵列天线;还可用于波束展宽及扇形波束的合成 In this paper; an effective method of multibeam smart antennas pattern synthesis for base station using digital beamforming technique is presented.
- The paper studies three key problem of base station array antenna for mobile communication, controlled radiation pattern, beam width and passive intermodulation. 本文研究移动通信基站天线中的三个关键问题,波束赋形、波瓣宽度、无源交调。
- For Vibrating the construction of all kinks of pier, bridge, tunnel, foundati- on of building, post, main beam and various perfabricated components. 适用于各种桥墩、桥梁、隧道、楼房基础、柱、主梁及各种预制构件的振捣施工。
- Compared with the conventional array receiver, optimal transmitting beam width decreases and transmitting power requirement is debased in the distributed array receiver. 与传统式阵列相比,分布式阵列可以采用更窄的发射光束宽度,降低对发射功率的要求。
- When the input power is smaller than the critical power, the beam width takes quasi-periodical diffraction with the Jacobian elliptic sine and elliptic cosine functions. 当光束初始功率小于临界功率时,光束束宽则按雅可比椭圆正弦函数和椭圆余弦函数作准周期展宽变化;
- The main reason of the main beam down deflection was that the most complex stress exceeded the admissible value and achieved the yield limit value. 主梁下挠变形的主要原因是受热引起的最大复合应力超过许用值,达到了屈服极限值,强度不满足要求。
- The antenna diagram approximation model used in our investigations considers constant gain within the full beamwidth of the main beam. 在研究当中,天线图解的近似模型在主要波束的饱和波束宽度范围内,可认为其增益是固定的。
- It is provided with a telescopic bracket.The box beam at the external side of the telescopic part of the bracket is inserted into the square hole in the main beam. 其中,拖架具有可伸缩功能,是通过可伸缩部分外侧的箱形梁插入货台主梁的方孔中,选择箱形梁上孔的位置来实现的。