单极天线

A novel arrow-shaped monopole antenna with a coplanar waveguide feed line is presented. The element and the feed line are etched on the same side of a substrate.

提出了一种新颖的共面波导馈电单极天线，"△"形辐射单元馈刻在介质板上，由同一面的共面波导传输线馈电。

In this paper,the radiation from a monopole on an elliptic cylinder is discussed by UTD for convex surfaces and two examples are given whose results are consistent with experimental data,which proves UTD to be available.

文中以单极天线为例应用UTD的曲面绕射理论对椭圆柱上天线的辐射特性进行了研究，给出了两个相关算例，结果与实际基本吻合。

So the circular disc monopole antenna is optimum designed and a novel Klopfenstein taper monopole antenna is proposed.

为此本文对圆片单极天线进行了优化设计，提出一种新型的Klopfenstein渐变单极天线。

These antennas can cover GSM900/DCS/PCS/UMTS operation. In the chapter 2, the antenna is designed based on the concept of monopole antenna. Furthermore, the antenna structure have two radiant paths and coupled each other at tail end to do impedance matching. In addition, to raise distance between radiation plane and ground will avoid capacitative effect effectually. In the chapter 3, the antenna is designed based on the concept of planar inverted-F antenna. Furthermore, that the antenna structure have two radiant paths and coupled each other at tail end to do impedance matching is similar to chapter 2. But there is a difference in them. We can choose the short position to change input impedance at this structure. In the chapter 4, the antenna is designed based on the concept of planar inverted-F antenna which takes coupled-fed. It will produce the first mode and high-order mode near the frequency, 900MHz. The feature of this type is to reduce the volume effectually. This antenna can not only cover GSM900/DCS/PCS/UMTS operation but maintain good radiation efficiency. Finally, we will compare three antennas, and develop procedure with industrial view, and propose the prospect of the GSM/GPRS antenna in PND, as a conclusion.

在第二章中，我们使用单极天线设计概念，使用双路径架构并於末端耦合来对天线阻抗做匹配，产生涵盖GSM900/DCS/PCS/UMTS四频操作频带，并提高与接地面的辐射高度，以避免电容效应，使天线具有良好的辐射特性；在第三章中，使用倒F形天线设计概念，使用双路径架构於末端耦合，并於辐射臂上采取适当接地点电感效应作输入阻抗匹配，达成涵盖GSM900/DCS/PCS/UMTS系统的四个操作频带；在第四章中，采用倒F形架构并使用耦合馈入方式，使得长辐射金属臂在低频900 MHz附近产生共振，产生低频基频模态及高阶模态，以达成宽频及频宽涵盖GSM900/DCS/PCS/UMTS频带操作，并有效缩减使用体积；最后，分别比较此三种架构的优缺点，再加以业界角度来思考，研发产品天线的流程及思考方向，以及天线应用於可携式导航装置中未来的展望作为本论文的总结。

The two-ring monopole antenna can improve the wind resistance capability while maintaining the basic characteristics of the antenna.

此外，由于此超宽带双环单极天线的环宽很窄，可以用软金属做成可折叠的便携式天线，具有较高的实用价值。

This hybrid antenna consists of a CPW-fed inductive slot antenna and three different shapes (I-, L-, and F-shaped) of the dual monopole antennas.

此混合型天线是由共面波导馈入电感性槽孔天线(CPW-fed Inductive Slot Antenna)分别和I、L和F三种不同形状的双单极天线组合而成。

Under the symmetry antenna structure, we use fork-shaped feeding strip-line design to cause the rectangular printed monopole antenna to be possible to achieve ultra-wideband operation.

并在接地面与辐射金属片对称等大小的天线结构下，利用叉型带线馈入之设计，使得矩形印刷式单极天线可达到超宽频之操作。

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。

The printed UWB antenna is comprised of a planar monopole radiator and the ground plane which are connected to a coaxial cable to launch RF signals. This kind of ground and antenna system is essentially an unbalanced design, where electric currents are distributed on both radiator and ground plane, and then leakage to the outer conductor of the feeding cable. The impedance matching and radiation pattern will be influenced in the low band, which are our focus. Finally, some techniques will be proposed to reduce the cable effect on the antenna performance.

进行超宽频天线量测时，吾人会利用同轴缆线连接到网路分析仪，这时的同轴缆线不只是扮演一个传输讯号的工具而已，由於单极天线的不平衡结构，对低频而言，接地回流电流会泄漏到同轴接地的导体外部，造成同轴缆线也是一个辐射体，影响到天线低频时的阻抗匹配与辐射特性，因此本论文将探讨同轴缆线对於天线一些参数的影响，并研究提出解决的办法。

The low material cost as well as the high product stability is two important factors to design the antenna of Bluetooth headset. Base on the HFSS simulation results, the meander line monopole antenna is applied for the frequency band 2402MHz~2480MHz of Bluetooth headset to design its antenna. The characteristics of the different meander line monopole antennas as compared under there different frequency bands.

本篇论文针对蓝芽系统的无线耳机天线，以节省材料成本以及增加产品稳定性为考量因素做为设计天线重点考量因素，依据应用曲折型单极天线模拟结果於蓝芽频段2402MHz~2480MHz之天线设计测试，并与不同曲折样式之天线在不同频宽进行性能比较。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。