查询词典 circular polarization

This article first antenna, microstrip theory, the circular polarization technology, the theoretical discussion, in this based on the microstrip antenna of circular polarization method - corner square microstrip antenna, and has done a design simulation , and then do the design and further research to improve and eventually get a resonant frequency (S11 reflection coefficient corresponding to the minimum frequency) for the 1.5GHz and 1.43GHz, the frequency of circular polarization for the 1.46GHz, S11 is less than -10dB relative bandwidth, the VSWR is less than 2 is about 8.8% relative bandwidth, axial ratio less than 3dB relative bandwidth of about 2.2% of the right circular polarization microstrip antenna design case, which proved very good the circular polarization microstrip antenna theory, also fully confirmed by a square corner design is a practical program, and select the appropriate regulation of sticks is indeed able to improve the performance of the antenna.

本文先对天线、微带理论、圆极化技术等进行了理论论述，在此基础上，提出圆极化微带天线的实现方法——切角方形微带天线，并对此做了设计仿真，后又对这一设计方案做了改进及进一步研究，最终得到一个谐振频率（反射系数S11 的最小值所对应的频率）为1.5GHz和1.43GHz，圆极化频率为1.46GHz，S11 小于-10dB 的相对带宽、驻波比小于2 的相对带宽约为8.8%，轴比小于3dB 的相对带宽约为2.2%的右旋圆极化微带天线的设计案例，从而很好的印证了圆极化微带天线理论，也充分证实了切角方形是一种切实可行的设计方案，而选取合适的调节枝则确能提高天线的性能。

I used circular polarization helix antenna and linear polarization horn antenna do a lot of experiments for many situation, for example, different polarization mode、different distance between antennas and metallic body among antennas, and I acquire some valuable data.

使用圆极化方式的螺旋天线和线极化方式的喇叭天线分别对不同极化方式、不同天线间距和天线之间存在金属障碍物等各种情况进行了大量的实验，并获得了有价值的数据。

Thus, this paper presents a circular polarization ultra-short pulse laser field of first-order correction, and research in the circle of electronic polarization ultra-short pulse laser correction of dynamic process.

由此，本文给出圆极化超短脉冲激光场的一阶修正解，并研究电子在圆极化超短脉冲激光修正场中的动力学过程。

There are three parts in our design: first, the dual-band branch line coupler provides two equal-power signals with 90° or -90° phase difference in each operating band. Second, the wideband switching circuit controls the two output powers of branch line coupler to excite the antenna structure for producing linear polarization wave or circular polarization wave. Third, the L-shaped fed conventional planar patch antenna is provided to overcome the coupling effect.

整体架构包含三个部分：L形电容耦合馈入式平面天线是为了克服平面式微带天线窄频的缺点；双频枝干耦合器提供天线在操作的两个频率点上各输出两组相差正九十度与负九十度的讯号，最后宽频的切换电路是将枝干耦合器的两组讯号作分配用以激发不同方向的天线以产生线性极化模态或同时激发两个垂直的天线以产生圆形极化模态。

Circular polarization is one of microwave equipment with broad application.its the mostly function is switch linearly - polarized wave into circular polarized wave.grating- circular polarization is one of circular polarization,its advantage is simple structure and ease of processing.it is prone to expand high power and high efficiency range.because circular polarization have expand application..

光栅圆极化器是其中的一种，它具有结构简单，加工实现容易，易于向高频率、高功率应用扩展等优点。

The test results demonstrate the circular polarization degree of output light of this optical circular polarization modulator is above 99.9%.

最后的光圆偏振度测试结果表明，本论文设计的调制器输出光的圆偏振度高达99.9%。

Modern satellite communication systems use circular polarization to maximize the polarization efficiency.

现代卫星通讯系统运用圆极化去达到最佳化极化效率。

A new methodology for measuring the characteristic parameter of the circular polarization antenna using the linear polarization antenna is proposed.

提出了一种利用线极化源天线测量圆极化天线特性参数的新方法。

The test results demonstrate the circular polarization degree of output light of this optical circular polarization modulator is above 99.9%.

最后的光圆偏振度测试结果表明，本论文设计的调制器输出光的圆偏振度高达99.9%。来源：ABC6a论文网www.abclunwen.com

Studies on circular polarization fiber laser gyroA circular polarization fiber laser gyro is proposed.

圆偏振光光纤激光陀螺的研究提出一种圆偏振态工作的光纤激光陀螺。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷