查询词典 antennas

All the antennas exhibit good broadside radiation patterns. In addition, good reading-range performance can be obtained when tags are mountable on metallic objects.

所提出的天线都具有好的垂向性射场型，贴附於金属物体上也有良好的读取距离。

Novel designs of low-profile UHF RFID tag antennas mountable on metallic objects are presented.

本文提出一系新型的可贴附於金属物体之超高频RFID低剖面标签天线设计。

A simple formula for the characteristic impedance of a type of noncoplanar fin antennas to be used simply is obtained by stripline theory.

首次提出并严格分析了超宽带鳍状天线，得到了其特性阻抗和电磁场分布的严格公式，详细分析了其辐射特性，理论分析表明它具有超宽带的特性，这是本章的重点。

Multiple frequency band antennas are pivotally connected to electronic devices such that coaxial connectors are not required.

多频带天线被枢轴连接到电子设备上以致不需要同轴连接头。

Considering the actual condition on the satellite, the forms of the antennas are defined as quadrifilar helix antenna and microstrip antenna, and their pros and cons are discussed.

其主要内容如下： 1 概述了该小卫星上对各种天线的使用需求，并针对该卫星实际情况，选定天线的形式，即四臂螺旋天线和微带天线，同时论述了它们的优缺点。

Delay distortion caused by log-periodic antenna can be avoided by changing its feed ing method; Reflection can be greatly reduced by resistively loading antennas as cylindrical monopole antenna,conical monopole and TEM horn antenna, resulting in better characteristics in radiating pulse signal.

改变对数周期天线的馈电方式可以避免滞后失真；根据 WU- KING偶极子理论，对圆柱单极子天线、单圆锥天线和 TEM喇叭天线等进行加载可以有效减小反射，改善了天线辐射短脉冲的性能，但同时也导致了辐射效率的降

If lots of flexible antennas attached to small radio sets were placed inside a bridge, they would expand or contract along with the bridge and so would constantly retune themselves.

如果这种形态可变的天线和微型无线电设施一道被大量设置在桥梁中，那么天线将持续的进行自我调谐。

If lots of flexible antennas attached to small radios were placed inside a bridge, they would expand or contract along with the bridge and so would constantly retune themselves.

如果许多可伸缩天线附着在微型无线电收音机上面，并且放置于大桥内部，它们就会随着桥相应地伸展或收缩，这样就会经常性的自我调谐。

Analyzing the array pattern, we show that the interference of other sectors, also to be MAI, can be effectively suppressed by the array antennas for a sectored UTRA TDD of WCDMA system.

对阵列模式进行分析，证明分扇区UTRA TDD模式的WCDMA系统能有效抑制多址干扰。

The author's main research work was focused on UCA, analyzed its beam-forming property with the array's radius and the number of antennas.

本文研究工作主要针对均匀圆环阵展开，分析了UCA的形成波束随天线阵半径和阵元数的变化规律。

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％。