查询词典 block antenna

The input impedance of the antenna, the wideness of the frequency working range and purity of the diagram of the antenna remained practically unchanged.

天线的输入阻抗，工作频率的带宽和纯正的方向图几乎保持不变。

Based on variational principle and split-based interpolation finite element method for fast and accurate analysis of normal mode helical antenna,Combination of genetic algorithm and then load the normal mode helical antenna loaded on the value of lumped elements,Load location,and matching network integrated optimal design parameters,And using Sherman-morrisorr Woodbury formula to quickly solce the load component values and load the changed position of the impedance matrix equation to improve the efficiency of optimized design.

采用基于变分原理和剖分插值为基础的有限元法来快速精确分析法向模螺旋天线，然后结合遗传算法对加载法向模螺旋天线上的加载集总元件的值、加载位置以及匹配网络参数进行一体化优化设计，并采用Sherman-Morrisorr Woodbury公式来快速求解加载元件值和加载位置改变后的阻抗矩阵方程，提高优化设计的效率。

This paper analyzes the Yagi antenna structure and principle and the use of HFSS software Yagi antenna performance analysis and structural design, made to further improve and optimize the performance of the methods.

本文主要分析了八木天线的结构及原理，并利用HFSS 软件对八木天线的性能结构进行分析和设计，提出了进一步改进和优化性能指标的方法。

Koch inverse L antenna and Yagi antenna are made use of research the miniature technology of antennas.

在这章的最后一节里，作者基于广义的分形理论，提出了一种更为实用的天线——双弯折形线天线，并对它的几何参数作了探讨。

The Yagi antenna or more correctly, the Yagi - Uda antenna was developed by Japanese scientists in the 1930's.

Yagi 天线Yagi 天线或更加正确地， Yagi - Uda 天线由Japanese 科学家发展了在30 年代。

The design of wideband circularly polarized printed antenna is an important issue of antenna research recently.

宽频圆极化的印刷天线设计是当前天线研究的重点之一。

Especially, discage antennas havesmall electrical size. Discage antennas combine the structure of discone antenna andcone-shape monopole antenna, and make use of ultra-wide-band twin-feed matchingsets.

针对小型化的要求，提出了电小天线的阻抗完全补偿和匹配优化的方法，并将该方法应用在已开发的新型笼锥天线系列上，可将天线工作频率的低端较大地向更低端拓展，从而实现天线进一步小型化。

Secondly, three types of radiotelemetry capsule antenna were proposed based on 3D digital body model and FDTD method. Finnally, radiation characters of the line gyral antenna at the four representative locations of the alimentary canal were studied.

基于人体的三维数字模型和FDTD算法，设计三种适用于生理参数遥测胶囊的天线：法向螺旋天线、长方体天线和回旋式线型天线，并给出了这三种天线的几何参数和基本性能参数。

Thin and small of powerful imaginal put oneself in another's position, body length makes an appointment with 3 millimeter, bosom black, abdominal tangerine, antenna black in all 10, penniform, eye hemisphere form, be located in antenna rear, there are 1 pair of simple eyes between compound eye.

雄成虫体瘦小，体长约3毫米，胸部黑色，腹部橘红色，触角黑色共10节，羽毛状，眼半球形，位于触角后方，复眼之间有1对单眼。

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。

He studied their excrement for evidence of livestock hair.

他为家畜毛的证据研究他们的粪便。

Loneliness is not grounds for deportation, deportation of the people are not all lonely people.

寂寞也不是放逐的理由，放逐的人也并不都是孤独的人。