单极天线

In spite of these, the effects about dielectric constant and its thickness to printed monopole antennas are discussed.

除此之外，文中还就介质的介电常数以及介质厚度对印刷单极子天线的影响进行了讨论。

In Chapter 4, the meander line and fractal technique are introduced to the design of antenna.

设计了一种用双杆作辐射体的平面组合单极子天线，具有结构简单、尺寸小、频带宽等诸方面的优点。

The method of moments is used to investigate the resonant characteristics of the antenna.

提出一种新型单极子天线，天线的辐射主体由双弯折线构成，通过矩量法研究天线的谐振特性。

An ultra-wideband two-ring monopole antenna is presented in this paper.

本文提出了一种超宽带双环单极天线的设计思想及应用模型。

In order to overcome the shortcomings of the monopole antennas, a methods of quasi-fractal is used, which decrease the resonant frequency.

为此，对HF频段的单极子天线进行准分形，有效地降低了天线的谐振频率。

Then on the basis of former studies, the miniaturization and planar structure of the circular monopole antenna are respectively analyzed and two feasible schemes are presented.

然后在上述研究的基础之上，本课题进一步分析了圆盘单极天线的小型化以及平板化的实现方案。

All these characteristics can extend frequency band , reduce antennaelectric size and improve impedance characteristics. In order to miniaturization ofantenna, impedance complete compensate and matching optimization of electricallysmall antenna are brought forward, and this method is applied to the discage antennas.

从阻抗特性和辐射特性的实测数据表明，水加载单极振子天线的谐振频率能很好地向低端下移，局部水加载单极圆锥天线在保持原有宽频带特性的前提下，以较少的效率损失实现了较大范围向低频区扩展，即天线小型化，这将为短波超短波波段天线进一步的小型化设计提供很好的思路。

A Quadrifilar Helix Antenna is adopted for the platform positioning and a horizontal monopole using the cylindrical wall of the cavity as its ground is adopted for communication.

定位天线采用四绕螺旋天线；通信天线采用以腔壁为地的水平单极振子。

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

A novel kind of rectangle column monopole antenna is presented.The equivalent diameter of the antenna is thick due to the double rectangular radiation plates connected with the metalized holes.

一种PCB柱形接地单极振子天线，通过利用PCB双面板的特性，制作出一个双面柱形振子天线，增加了天线的等效直径，展宽了天线的阻抗带宽。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新