查询词典 antenna

In anFDD wireless system, the duplex spacing between uplink and downlink islarger than the coherence bandwidth of the mobile radio channel, thus theuplink and the downlink small-scale fading is uncorrelated. Moreover, thearray response is correlated with the frequency of the signal carrier. So it isimpossible to resue the uplink weights for downlink beamforming. As aresult, the application of smart antenna for the downlink is a difficult problem.

在频分双工系统中，由于上、下行载波的频率差大于相干频带，上、下行信道衰落是不相关的，而且阵列响应也与信号的载波频率有关，因此，上行信道不能直接用来估计下行信道，故智能天线应用于下行链路是一个难点。

The two stage telescopic lattice frame is composed of three boom sections sleeve-mounted together, tail end of the outmost basic boom frame is pivot-connected respectively with slewing mechanism and luffing mechanism on the chassis; the inner two section booms can telescope freely like a retractive antenna to change the delivering distance of the conveyor and the operating radius.

两级伸缩臂架由套装在一起的三节臂架组成，最外层的基础节臂架尾部和底盘的回转机构、变幅机构分别铰接，固定于底盘上；内层的两节臂架可如拉杆天线一般自由伸出和缩回，改变输递机的输送距离，从而改变施工半径。

A novel ridged conical TEM horn antenna has been developed.

因此为设计超宽带天线打下了理论基础。

But we can believe that it will be a satisfactional method for its many merits. Keywords: ground penetrating radar, crosshole radar, electromagnetic fields, forward problem, dipole antenna. propagation constant.

这一现状当然要依靠理论的完善来加以解决，虽然这一过程是长期的，但可以相信，由于探地雷达的诸多优势，它必将获得极大发展而成为一种最理想的地下物探手段。

After the vast majority of scribing was done I needed to make a conduit for the floating wire antenna.

之后，绝大多数划线做我需要作出管道，浮动线天线。

The sectored array antenna is applied to the base station of TD SCDMA.

该天线阵列用于TD SCDMA基站系统中。

Firstly, to meet the demand of smart antenna system sectored coverage mode, the arrays configure and excitation phase are synthesized by the global-search Genetic algorithm.

首先依据智能天线系统扇区覆盖模式对方向图的要求，利用GA的全局搜索性能，综合了阵列结构及单元激励相位。

The concepts of sectorial smart antenna and edge interferences are proposed. The optimum principle of sectorial beam and two channel distribution schemes to solve the edge interference are illustrated.

提出了扇区化智能天线系统的概念和边缘干扰问题，给出了扇区波束的优化原则和解决边缘干扰问题的两种信道分配策略。

The olfactory receptors in the sensilla of the antenna, maxillary palps and proboscis respond to the odors from the environment.

气味分子与嗅觉气味结合蛋白和气味受体的结合所启动的一系列生化反应产生神经动作电位。

Furcifera was observed with scanning electron microscope. Three types of sensilla and a kind of sensilla cluster were observed on the antenna of the adult, and no morphological difference was found in these sensilla between the male and female adults.

结果表明，白背飞虱成虫触角上有3种类型的感器--毛形、刺形和耳状感器，以及由毛形和耳状感器组成的一种菊花状的感器簇，且这些感器在雌雄中不存在二型性。

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％。