Jan 27, 2011
The Economist says, "America’s navy is developing an antenna made of seawater." A warship bristles with more than 100 large copper antennae that send and receive signals for its weapons, its radar and its voice and data communications. A lot of aerials, then, but still not enough. The navy wants its ships to carry even more of them. Fulfilling that desire has, however, stymied experts for decades. If placed too close together, antennae interfere with each other’s signals. They also get in the way of aircraft and weapons. And, crucially, naval antennae many of them more than 20 metres tall make warships more easily visible to enemy radar.
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