The entire length of the tower is equipped with a feeder (a coaxial wave-guide) through which signals are transmitted from the transmitter to the antenna on the spire.

信号传输线(一个同轴波导管)贯穿整个塔身，通过它，信号从传输器运送到塔尖的天线。

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In a mobile base-station the radio circuitry usually sits in a cabinet and is connected by a cable to an antenna on the tower overhead.

手机基站的无线电路通常在一个机柜里，由电缆连接到高架塔上的天线。

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The tower is designed to put the antenna at a maximum height on the spire.

电视塔的天线设计在塔尖的最高处。

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Many people felt this was unfair, because the Sears Tower's tall antenna was not included in the official height measurement.

VOA: special.2010.03.31

"If WIMAX technology a technology a lot of folks are talking actually works you can put an antenna on a tower downtown and the whole downtown is connected with very fast broadband, " he says.

NPR: Broadening the Reach of Broadband

On this day, the One World Trade Center workers were lowering in to place the very first ring that would support the spire, or antenna, of the tower.

FORBES: A Tour Of One World Trade Center

This makes them easy to set up--no tower or central antenna needed--as well as hard to knock out, since if one device goes down, the others will route around it.

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