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The method of moments is used to analyze and calculate the broadband characters of impedance,voltage satanding wave ratio,gain and radiation pattern of larger angle LPDA,and the relation between these characters and the parameter of antenna construction is discussed in this paper.

本文采用矩量法分析和计算了对数周期天线在张角较大时，它的阻抗、电压驻波比、增益及方向图的宽带特性，讨论了这些特性与天线结构参数之间的关系。

The electric characteristic parameters of this novel sleeve antenna are calculated, including the input impedance, voltage standing wave ratio, horizontal gain and radiation pattern.

研究了这种新型套筒天线的输入阻抗、电压驻波比、增益及辐射方向图等电特性。

In order to take the advantages of multi-antenna scheme of the system as well as multi-path energy under the circumstance of multi-path fading channel, and to acquire downlink frame synchronization and symbol synchronization by exploiting digital disposal method, we put forward the timing synchronization arithmetic of two demension energy window which is based on the interpolated signals over two times over-sampled incomings.

为了在时变多径衰落信道环境中充分利用多天线和多径能量检测的优势，并为了使系统可以采用数字处理方法实现下行链路的帧同步和符号定时，我们提出了基于两倍过采样进行插值的二维能量窗定时同步算法。

Based on UGNX/Motion, it has detected the interference phenomenon between the movingantenna and the feedback antenna.

应用 UG NX/Motion 软件，对运动天线和响应天线之间的干涉现象进行了研究，对存在的设计问题进行了改进，获得了合理的结构。

Antenna cable isolator is basically quite simple circuit but it must be built correctly.

天线缆绳绝缘物是基本上相当简单的电路但它必须正确地被修造。

This algorithm is capable of adjusting the weights of the antenna array in real time to respond to and improve the global positioning system received signals coming from the desired directions and at the same time to highly suppress the jammers coming from the other directions.

这种结构通过提调整天线阵列的权值，实时地接收并改变来自各方向的GPS信号，同时对不同方向的干扰信号有高的抑制比。

In prior art, the position and attitude control for antenna can only realized in small-scale, and lies in the means of hydraulic cylinder, gear box and rotary joint.

目前天线的位姿控制还都在小范围内实现，实现的手段是通过液压缸、齿轮箱和旋转关节等刚性结构的运动。

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。

Finally, the control method of structure response vector reconstruction is applied to the vibration active control of the layer board made in complex materials on the satellite antenna. It is showed that this method is effective.

最后把结构振动响应向量重构控制方法应用于层板式复合材料卫星天线的实际振动控制中，验证了该控制方法的有效性。

In order to increase the volume of the speaker for public broadcast, I connected it with a 50 feet long antenna which was put on the roof as well as a 20 feet long vertical leading wire.

我把一条50尺长的天线放在屋顶，再加上一条20尺长的垂直引线，就成功提高音量，变成公众广播，让所有人都可最快地获得战况的消息。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。