【天线专题】N8PPQ讲述新款天线研发的心路历程 | 一款成功替代框型天线的产品横空出世

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作者：N8PPQ

BG5WKP 朱轶 编译

A Successful Alternative to the Cubical Quad

一款成功替代框型天线的产品

The revolutionary antenna you see pictured, the E-Z-O, was created by N8PPQ as the result of his efforts to reduce the cost of a longtime favorite, the cubical quad.

如上图所示这款具有革命性意义的天线E-Z-O，他的发明者N8PPQ长期致力于降低框型天线的成本。

The idea came after a Scouting event, and was inspired by the way tent design has changed, with flexible tubes replacing ridged poles.

在参加了一次童子军活动之后，N8PPQ制作这款天线的灵感来源于这次活动的帐篷用弹性管替代了成脊状支撑杆的设计方式的改变。

Cost savings were significant, but the design has several other advantages.

成本降低很明显，但是设计这款天线还有其他一些优点。

The antenna is much lighter than a cubical quad. It also presents less surface area for wind and ice loading. Stresses from gusts are relieved because the elements are not rigidly fixed to the boom. All this allows for a smaller and cheaper boom. And it is easy for one person to install. To top all that, this antenna even performs better than a cubical quad! The square loops of a quad admit to being only approximations to their theoretical ideal: circles.

这款天线比框型天线要轻得多。减少了大风和下雪的有效载荷面积。来自阵风的压力可减轻不少，因为该款天线的所有部件并不严格固定在吊杆上。这允许该天线配备一根更小、更便宜的吊杆。一个人很容易安装。最重要的是，该款天线的表现比框状天线要好，框型天线的方形环在理论值上和圆形环是接近的。

In spite of its humble inception, this could be the biggest improvement in antenna design in over 50 years!

尽管是谦虚的观点，但这可能是天线设计在50年内最大的进步!

The most fascinating part of a ham radio station, for me, has always been the antenna system. I have installed sophisticated antennas for clubs I belong to, but my personal station has only used some type of wire. That changed last summer.

对我而言，一个业余无线电台站最神秘的部分就是它的天线系统。我曾为我所在俱乐部安装了复杂的天线设备，但是我的个人电台只是使用一些长线天线，但是去年夏天，这一切都改变了。

While trying to reduce the cost of my longtime favorite, the cubical quad, I created the antenna you see pictured. It is a radical break from convention designs. (Patent Pending)

我长期偏向于试图降低框状天线的成本，我创建了天线可以看到照片。这是一个在展会设计的彻底颠覆。(专利申请中)

I wanted to save money. Spreader arms and “spiders” that attach them to the boom are expensive. I recalled the way camping tents have changed, with flexible tubes replacing ridged poles. I imagined that fiberglass tubes could support the wire elements of a quad more cheaply. I was right. I saved money with this design.

我想节约经费。支撑臂和附属在吊杆上的“蛛网”都价格昂贵。我回忆起野营帐篷的改变，灵活的弹性管取代成脊状的支撑杆。我想,玻璃纤维管道可以成为支持框状天线更便宜的金属元件。我是对的。我用这个设计节约了资金。

Another surprise was the positive response from my neighbors. People smile and ask what it is. When I tell them it’s a ham radio antenna, they congratulate me. Other antennas, with sharp protruding angles hoisted above the boom, have elicited fear and skepticism. Evidently these thin circles suspended below the boom are not threatening.

另外的惊喜来自于我的邻居们的正面反应，领居们都微笑的问我这是什么，当我告诉他们这是业余电台的天线的时候，他们都给送给我祝贺。通常，如果安装其他天线，用锋利的突出的角在吊杆上方升起往往会引起邻居的恐惧和怀疑。很显然，这些安装在吊杆上的薄薄的圆环对大家没有威胁感。

This antenna shares the positive characteristics of a quad. For example, radiated signals do not couple with the tower. That is because when fed from the top, the E-Z-O Antenna is horizontally polarized. And since quad antennas characteristically propagate at low angles even at heights below L/4, suspending the E-Z-O below the boom is inconsequential for most tower heights.

这种天线拥有框型天线的好的一方面表现。例如，辐射信号不会传导到铁塔。这是因为当信号从顶部反馈下来时，E-Z-O天线已经将其水平极化了。由于框型天线在低角度甚至在高度低于四分之一波长的典型传播特性，低于吊杆的E-Z-O天线对大多数铁塔高度的要求没有太多限制。

I am primarily a DXer. My biggest concern is being heard over the pileup. For that, I need gain. The 3 element E-Z-O gives 15 dB over my G5RV, which is no slouch itself having earned me 235 DXCC’s during this sunspot minimum.

我主要是玩DX通联。我最大的担忧是接收信号堆叠。为此，我需要有高增益的天线装备。这款3元件E-Z-O 天线比我的G5RV增益提高了15 dB，这是在这个太阳黑子的最小时期，进行了235 个DXCC通联记录。

source：http://www.ezoantennas.com/

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