查询词典 dipole antenna

The calculation of dipole moment by MEEM The dipole moment is a physical quantity, which can indicate the charge distribution of the molecule. The value of dipole moment can be conferred from the situation of the molecular symmetry, and vice versa.

偶极矩是表示分子中电荷分布情况的物理量，可以由分子的对称性推测分子有无偶极矩，也可由分子有无偶极矩及偶极矩的大小了解分子结构的信息。

The possible reason is that doped Zr〓 ion enters the interstitial sites for its small ionic radius and no dipole complexes were formed. Monovalent ion F〓 has been reported to improve the scintillating performance greatly. Our results show that Agrand diagrams of F〓: PWO crystals obey an modified Cole-Cole equation. The crystals present similar dielectric relaxation phenomena to but have much higher activation energy than that of RE〓: PWO crystals, which originate from the 〓 dipole complexes. The co-doping of trivalent Y〓 and pentavalent ion Nb〓 does not always show a better scintillation performance than that of solely doped samples, which could be attributed to the existence of the 〓 dipole complexes, which counteract the solely doping effect.

而Zr〓由于离子半径太小，可能进入间隙位置，不形成类似的偶极缺陷；一价负离子F〓的掺入提高了晶体闪烁性能，阻抗谱测试结果表明F〓：PWO晶体Argand图符合修正的Cole—Cole方程，晶体同样表现出介电弛豫现象，并具有比RE〓：PWO晶体中高得多的弛豫激活能，可能起源于形成的〓偶极缺陷；Y〓和Nb〓双掺的PWO晶体并没有显示出两种离子单掺优点的叠加，阻抗谱测量结果表明，在双掺晶体中可能形成〓偶极缺陷，使两者掺杂作用相互抵消。

According to the theory of antenna and electromagnetic, I simulated the helix antenna which is common antenna on the satellite, and I acquire the preferable result and made different circular polarization helix antenna.

根据天线和电磁场理论，笔者通过仿真星载天线中最常见的螺旋天线，得到较好的效果后，制作不同圆极化方向的螺旋天线。

In an RF front-end having a plurality of signal paths connectable to an internal antenna or an external antenna, an antenna switch part is used to select either the internal or the external antenna.

在具有可连接到内部天线或者外部天线的多个信号路径的RF前端中，天线开关部分被用来选择内部天线或者外部天线。

Because it is a fastener of secondary antenna emitter and secondary antenna main body, in addition is fixed part and brace of secondary antenna reverberator, its structure parameter affect the whole antenna system's dynamical characteristic greatly, farther affect the other dynamical design index and to adjust secondary planet's pose .

由于它既是卫星天线反射器与卫星星体的连接件，又是卫星天线反射器的固定件和支撑件，故其结构参数对整个天线系统的动力学特性影响极大，进而影响到天线的其他动力学设计指标和卫星姿态的调整。

In the antenna device for the mobile phone, at least one sub-antenna device is installed lengthwise facing the sliding module and is electrically connected to or separated from the body housing, slidingly approaching or moving away from the body housing along with the sliding module, and at least one connection unit electrically connects the sub-antenna device to the body housing for signal transmission between the sub-antenna device and the body housing.

在用于移动电话中的天线装置中，至少一个副天线装置沿着纵向面对滑动壳安装，用于电连接到机身壳或者从机身壳电分离，与滑动模块一起滑动地接近机身壳或者从机身壳远离，并且至少一个连接单元将副天线装置电连接到机身壳，以便于副天线装置和机身壳之间的信号传输。

Based on the analysis of characteristics of smart antenna,detailed discussion is performed for the theoretical methods of smart antenna. According to different methods of antenna beam processing and forming,smart antenna's architecture and classification are introduced.

0引言智能天线的概念是90年代初由一些学者提出，在微波技术、自动控制理论、自适应天线技术、数字信号处理技术和软件无线电技术等多学科基础上综合发展而成的一门新技术。

We first will separately discuss the classic CPW fed circular printed slot antenna and rectangular printed monopole antenna. Afterward we propose the ultra-wideband CPW fed circular printed slot antenna with trapezoidal tuning stub and wideband rectangular printed monopole antenna with a fork-shaped feeding strip.

吾人将先分别探讨典型共平面波导馈入之圆形印刷式槽孔天线及矩形印刷式单极天线，继而提出具梯形调谐段之共平面波导馈入超宽频圆形印刷式槽孔天线及具叉型馈入带线之宽频矩形印刷式单极天线。

In order to cover the shortage of the current antenna for high power microwave weapon, the idea of a magnetized plasma channel used as antenna for radiating electromagnetic pulse is proposed. The normal modes of Magnetized Plasma Channel Antenna in lossy gas are analyzed. The concrete realization method of MPCA is simply described. The geometric-model of MPCA is created based on the operating principle of the antenna.

摘要该文针对现有高功率微波武器辐射天线的不足，提出了将磁化等离子体通道用作电磁脉冲辐射天线的思想——磁化等离子体通道天线，分析了MPCA周围为有耗气体媒质时MPCA所传播的一般模式。

This paper chooses a normal mode helical antenna to replace the short dipole antenna to improve efficiency.

本文采用法向模螺旋天线代替以前采用的短偶极子天线以提高效率。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。