查询词典 antennas

Polarimetric Synthetic Aperture Radar measures the frequency, magnitude, absolute and relative phase of targets' backscattering signals in imaging scene for any possible combination of transmit and receive antennas. The polarization synthesis technique on one hand has greatly increased the acquired polarization information, on the other hand increased the difficulty of system design and signal processing.

中文摘要极化合成孔径雷达的回波信号可以提供不同收发极化状态组合下成像场景内目标散射波的幅度、绝对和相对相位、频率等信息，极化合成技术的出现使获取的信息量成倍增加，信息量增加的同时系统设计和信号处理的复杂度增加，因此极化合成孔径雷达相关技术的研究成为微波遥感领域的热点。

The output ports of the hybrid power divider can be coupled to various devices such antennas or power absorbing elements.

混合型功率分配器的输出端口可以耦合到各种器件比如天线或功率吸收元件。

In the computation of parameters of the microstrip antennas by MPIE,the inability to determine exactly the singularities of the dyadic and scalar Greens functions in space domain at the zero distance brings the unexactness to the whole calculation of parameters of the microstrip antennas.

在采用MPIE方程计算微带天线的参数时，由于无法精确确定零距离处的空间域并矢Green函数和标量Green函数的奇异值，对微带天线的整个计算结果的精确度产生了不利影响。

In this paper, multifunction integrated antennas used for submarine communication are studied, three antennas of different band, usage and shape are installed together in the top of a steel can buoy, which are floating on the sea.

本文研究了一种用于潜艇通信的多功能组合天线，将三种不同频段、用途和形状的天线安装在钢质浮筒顶部的天线罩内，工作时浮筒携带天线飘浮于海面上。

The addition of conic funnet (这里的funnet疑似funnel——译者注)can partially improve the situation, but such horn antennas have uneven diagrams in vertical and horizontal planes, which is very undesirable for antennas that pretend to be good and efficient feed for dish.

加上圆锥形漏斗可以部分改善这一状况，但是这样的喇叭天线的水平和垂直方向图是不平衡的，这对于一个很好的，高效的抛物面馈源来说是个很大的麻烦。

Several such tapered slot antennas were arranged radially to form a circle, and a group of PINs was put at their feed lines. With the proper sequence switch of PINs, these tapered slot antennas can be constructed into an equivalent omnidirectional antenna.

将几个这样的渐变缝隙天线以放射状构成一圈，并在它们的馈线上引入一组PIN开关，以适当的时序控制PIN开关依次切换，可构成一种等效的全向天线。

These two series switches are separately connected to two different antennas for selecting one of the antennas in order to route the signals in that signal path.

这两个串联开关分别地连接到两个不同天线以选择该天线之一，以便将那一信号路径中的信号路由。

There are few equivalent circuit modeling methods for UWB antennas. This thesis compares the characteristic of some existing modeling methods and presents a general and precise modeling method for UWB antennas. Firstly, establish the narrowband model of the antenna, and compute the difference between input admittances of the antenna and its narrowband model. Secondly, implement rational approximation of the difference to build the macromodel, and convert it into SPICE equivalent circuits. Lastly, combine the narrowband model and the macromodel to form the ultimate equivalent circuit model of the antenna.

本论文针对目前UWB天线等效电路建模方法比较少的现状，结合现有的天线建模方法的一些特点，研究了一种系统通用、模型精度高的新建模方法：首先建立超宽带天线的窄带模型，计算天线及其窄带模型导纳的差值；接着对差值进行有理多项式拟合，得到相应的宏模型，并转化为SPICE等效电路；最后合并窄带模型与宏模型电路，得到天线等效电路模型。

Another term that is used for Wifi antennas are omnidirectional antennas.

另一个词是用于无线天线是全方位天线。

Furthermore, UHF antennas are smaller than VHF antennas; this is due to the shorter wavelengths.

此外，在超高频天线都小于甚高频天线，这是由于较短的波长。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐