八木天线

一种八木天线前向增益优化的改进处理方法

An improved method of optimization for forward gain of Yagi-Uda antenna

因此，光八木天线也需要保持在亚波长尺寸才可以达到有效的单引向作用。

Therefore optical Yagi-Uda antenna can effective better unidirectional director only when its size keep under sub-wavelength . 5 .

以二频道为例，分析了小尺寸八木天线前后比F／B的窄带性及展宽频带的方法。

With TV channel 2 as example , narrow performance of small size Yagi antenna front-to-back ratio F / B and method used to expand the F / B bandwidth has been analyzed .

介绍时域有限差分（FDTD）法计算准八木天线驻波比的算法实现方法。

The Finite Difference Time Domain ( FDTD ) method was used to calculate the Voltage Standing Wave Ratio ( VSWR ) of a quasi-Yagi antenna .

研究结果表明，相对一般的八木天线，Koch八木天线的谐振频率显著降低，但辐射方向图仍保持类似。文章还详细给出了各主要参数对Koch八木天线性能的影响。

The result shows Koch Yagi antenna can lower the resonant and at the same time maintain the good radiation pattern .

在此基础上，设计了三个单端口馈电的方向图可重构五元微带八木天线，通过开关调节寄生贴片的状态，可使天线在E面上半空间实现波束连续扫描。

Based on the analysis , three single-port 1-dimension 5-element pattern reconfigurable Yagi patch antennas are designed . By switching the states of the parasitic elements , the radiation beams can scan in the E-plane in the upper space .

介绍了基于矩量法的NEC分析八木天线的原理和单纯形法的基本原理，并将两者结合起来提出了一种适合工程中使用的优化设计方法。

The theory used in the analysis of the Yagiuda antenna of NEC which is based on method of moment ( mom ) and the simplex are briefly introduced in this paper .

采用双种群遗传算法（DPGA）结合时域有限差分法（FDTD）优化八木天线的单元间距和长度，以实现更优方向图。

A double population genetic algorithm ( DPGA ) combined with finite-difference time-domain ( FDTD ) method is introduced to optimize the element spacing and lengths of Yagi-Uda antennas .

分形八木天线的实验研究

The Experimental Research of Fractal Yagi - Uda Antenna

基于矩量法的分形环八木天线的特性分析

Analyzing Characteristics of Fractal Yagi Antenna on MOM

瞬态极化实验雷达收发八木天线阵列设计

Design of Antenna Array of Instantaneous Polarization Radar

一种新型的层叠式介质埋藏贴片八木天线

Newly patch Yagi antenna of cascade-dielectric embedded

等离子鞭天线及米波超短间距八木天线性能研究

The Research of Performance of Plasma Whip Antenna and Closely Spaced Yagi Antenna for Meter Waves

在单端口馈电方向图可重构微带八木天线的基础上，还设计了一个双端口馈电的方向图可重构二维微带八木天线阵。

Based on the analysis , three single-port 1-dimension 5-element pattern reconfigurable Yagi patch antennas are designed .

通过数值仿真，分析了冯卡曼天线罩对半波振子和八木天线电参数的影响，其结果具有工程参考价值。

Numerical results for the effect of the von Karman radome on the above-mentioned antennas are presented .

第四章提出了几种将槽单元引入微带八木天线实现方向图重构的天线方案。

In Chapter 4 , several schemes of pattern reconfigurable Yagi patch antenna are presented by introducing slot units .

第三章分析了二元微带八木天线的频率特性和方向图特性，并引入槽单元，改变了天线的特性。

A slot unit is introduced to the two-element microstrip Yagi antenna and changed the characteristics of the antenna .

接着，论文研究并测试了分别利用微带八木天线和微带矩形天线激励的碳纳米管阵列的辐射特性。

Secondly , we analyze and test the radiation properties of carbon nanotube array fed by the microstrip yagi antenna and microstrip patch .

提出了一种采用二维电磁带隙结构地板为反射器的微带八木天线。

A microstrip Yagi antenna that employs a2-D EBG ( Electromagnetic Band-gap ) ground plane as the reflector is presented in this paper .

基于八木天线和微带天线原理，详细介绍了三角形贴片天线实现方向图可重构特性的方法。

Firstly , according to the principles of Yagi-Uda antenna and microstrip antenna , the pattern reconfigurability mechanism of the proposed antenna is explained in detail .

仿真软件详细研究了具有分形单元的八木天线的阻抗特性和方向图，探讨了分形单元对八木天线的横向尺寸的缩减作用，并介绍了分形单元对交叉极化的影响。

The miniaturization effect by fractal unit to the lateral size of the Yagi-Uda antenna is discussed , and introduced the influence to the cross polarization .

在获得了八木天线电参数的基础上，又探讨了改变相位对阵列天线辐射性能的影响。

The paper obtained electrical parameters of a single Yagi antenna through the simulation , discussed the affect of changing the incentive phase of the phase array antenna .

对细线结构、环结构、分支结构、对称振子天线、八木天线、对数周期天线进行了精确的建模和数值仿真。

The exact modeling and simulation for wire junction , wire ring with quadrate shaped , dipole antenna , yagi antenna and log-period antenna are presented as the examples .

如果两种天线的工作频率相同，则分形八木天线的高度和普通八木天线相比可以压缩23%。

If the two kinds of antennas work at the same operating frequency , the height of fractal Yagi-Uda Antenna can be 23 % lower than that of the traditional Yagi-Uda Antenna .

然后根据最佳通信距离，论述了在此距离上流星突发通信中常用的八木天线的覆盖范围及在给定工作频率下的天线架高。

And then , based on this optimal distance , it dealt with the overlay range of Yagi antenna commonly used in meteor burst communication and antenna height on the condition of the particular working frequency .

最后，在寄生贴片上引入一种槽单元，通过改变槽单元的尺寸和位置，改变了八木天线的频率特性和方向图特性。

At last , a slot unit is etched on the parasitic element . By changing the size and location of the slot , the frequency and pattern characteristics of the two-element Yagi patch antenna are changed .

研究了微带八木贴片天线的频率响应特性和辐射特性。

The frequency response and radiation characteristics of a microstrip Yagi Array antenna were studied .

利用三维电磁场仿真软件（Ansofthfss）对准八木型微带天线单元进行了仿真计算。

A software for 3D electromagnetic field analysis ( Ansoft HFSS ) is used to simulate the microstrip-fed quasi-Yagi antenna .