天线

The mathematical models of the delay of the GPS signal in the circumstance are put forward respectively. The computation of orbital arc of the two satellite constellations is based on two body problem and perturbations models. An algorithm based on the IRI model and thin layer model is used to simulate the ionospheric delay of the GPS signal. The error models of observation, multipath, relativity and antenna phase center bias are also researched. Under the consideration of the autocorrelation of the electronical measurements, the autoregressive model of time series is introduced into the noise models.

在信号仿真中，研究了利用二体运动和摄动法计算LEO卫星至GPS卫星星座的几何距离的问题；在信号的误差模型中，研究了电离层时延的IRI2001模型和单层投影模型；讨论了观测误差、多径效应、相对论效应和天线相位中心偏移的误差模型；结合电子测量噪声的具有自相关特性的经验，研究了观测误差的AR模型；结合实测数据分析，讨论了接收机钟差和卫星钟差的误差建模问题。

Based on the concept of antenna near-field measurement and the theory of plane wave spectrum, the theory of plane near-field measurement and error analysis are introduced, two errors of plane radiation near-field measurement are discussed in detail: the probe positioning error and the truncation error of finite scanning.

本文从天线近场测量的基本概念出发，以平面波谱理论为基础，介绍了平面近场测量理论及其误差分析方法。

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 impacts of antenna parameters, excitation frequency on the voltage were discussed in the theoretical part.

论述了电磁波通道式 MWD传输装置信道计算的等效传输线法，分析了天线参数、激励源频率等参数的变化对检测电压的影响规律，并通过计算探讨了影响电磁波传输质量的因素。

The principles of microstrip balun and printed dipole were analyzed, and the antenna＇s ground plane was extended and shaped to form the reflecting structure.

分析微带巴伦和印制偶极子的工作原理，延伸并成形天线的地平面以得到反射结构。

Anyway, I googled wifi extender antenna what i ...

无论如何，我用Google搜索无线扩展天线是我。。。

Study of Behavior Mechanics of the Extendible Satellite Antenna with the Type of Twinning Ribs［J］.

星载天线缠绕肋条的力学特性研究［J］。

The area that has pulse drive only connects means to give out the device that choose frequency, like exterior sound wave the time domain of filter and antenna is answered.

只存在脉冲激励的带通体例给出选频安装，如概况声波滤波器和天线的时域响应。

It is easier to fabricate and is easier to integrate with circuit.

论文的写作也不够严谨：1。没有给出天线阵的具体设计过程。2。

In order to assure the orbital antenna have the higher thermal stability, it＇s necessary to carry on the analysis of factor influence for temperature under space environment.

为了保证星载天线在轨运行时有较高的热稳定性，就必须对其进行空间环境下的热温度场影响因素分析。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。