查询词典 antenna

We choose a project with loaded annual ring microstrip antenna, and the character of compact and broadband is achieved by loading a chip-resister to the antenna. The antenna is analysed by the software based on MOM.

文中选择与引信弹体共形的环形微带天线作为设计方案，通过对环形微带天线加载电阻，实现天线的小型化和高带宽；使用基于矩量法的电磁仿真软件对天线进行分析，并对天线参数进行了测量，给出了天线性能的仿真和测试结果。

MOM and its accelerated algorithm MLFMM were introduced to simulate the planar Archimedes spiral antenna,conical spiral antenna and radome with antenna.

采用矩量法和MLFMM来分析平面阿基米德螺旋天线、角锥螺旋天线和天线罩对天线性能的影响。

Planar Archimedes spiral antenna,conical spiral antenna and the printed log periodic dipole antenna,were researched in frequency domain on the demand of jammer and seeker.

根据干扰机和导引头应用需要，从频域来研究平面阿基米德螺旋天线、锥台螺旋天线和印刷对数周期天线。

There are all kinds of antennas used in EMC test such as biconical antennas, log periodic antenna, helical antenna, ridged horn antenna and etc.

用于电磁兼容试验的宽频带天线有很多类型，如双锥天线、对数周期天线、螺旋天线、喇叭天线等等。

In Chapter 4,further theoretical study on UWB biconical antenna and V-coni-cal antenna is presented.The theory of biconical and V-conical antenna with ellipticcross section is developed in the sphro-cone coordinate system under the assump-tion of TEM mode.

第四章研究UWB/SP的辐射天线，对双锥天线及V—锥天线在理论上作更进一步的研究，发展了无穷长双椭圆锥天线的理论提出了一种新天线结构形式-V椭圆锥天线。

During experiment researches, an impedance converter is designed to connect the standard port with the antenna input port, and the method of comparing with standard linear polarized antenna is used to measure array antenna circular polarized gain.

在实验中，设计了用于连接标准接口和天线输入口的阻抗变换器，对阵列天线辐射特性的测量采用了标准线极化天线比较法。

A kind of best baffle-beard suitable for applications in the dual-frequency base station antenna is presented, meanwhile, we adopt the PSO algorithm to optimize the parameters affecting antenna pattern such as the phase of the elements, the space between the elements, such that the pattern of antenna can be shaped in the vertical plane （the pattern in the vertical plane has Cosecant beam in the service area）.

针对我国移动通信频率，以基站天线的双频工作以及阵列波束赋形为目标，设计了一种满足基站天线双频辐射要求的最佳反射板形状，并通过PSO全局优化算法优化各单元馈电相位并调整其间距以实现垂直面方向图双频波束赋形的目的（即垂直面方向图在所覆盖的服务区域内具有余割波束）。

The working situation of whole system and antenna have been analyzed and tested, the results show the main p roperty of antenna meet to design and application requirements, which can be used to practical exporation. The evaluation results of borehole radar systemps detection ability and application prospect using this antenna show the detection distance of borehole radar system in granite and limestone is several decameter to 100 m.

分析检验了整个系统和天线的工作状况，实验表明天线主要性能满足设计和工程应用要求，可应用于实际勘探；并对采用本天线的钻孔雷达系统的探测能力和应用前景进行了评估，钻孔雷达系统在花岗岩、石灰岩等岩层中的探测距离可到几十米至100 m。

Experiment results show that equiangular spiral antenna basked EBG structure has a wider frequency bandwidth, higher gain, and larger front-to-back ratio than a traditional spiral antenna with ground plate; and also the thickness of antenna is reduced obviously.

实验结果表明，背衬EBG材料的等角螺蜷天线与传统的带反射板的等角螺蜷天线（辐射器离反射板的高度为λ／4）相比能够同时提高增益、展宽带宽、改善前后辐射比，并且显著减薄天线的厚度。

The antenna access for the device is under the flip-up antenna and I am already concerned about the longevity of the card as looking down into the antenna port hole I do not see a lot of supporting material in and around the connection.

天线准入器下翻盖了天线和关心我已经长寿的卡俯视港口进入天线孔我看不出有很多方面和周围的物质支撑。

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％。