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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"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

The Council on Tall Buildings and Urban Habitat, a Chicago-based organization considered an authority on such records, says an antenna is something simply added to the top of a tower that can be removed.

WSJ: Spire permanently installed on WTC tower