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

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.

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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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It leases and manages antenna space on its multi-tenant communications tower sites to wireless service providers and radio and TV broadcast companies.

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