Radar on a smaller-than-penny chip
"The high-frequency beams that the system generates and receives may one day handle many functions, including the usual radar jobs of ranging and location. In cars, for example, the chip might be used to detect other vehicles looming in the fog.
The chip may also be used for wireless communications, since it has a broad bandwidth or range of frequencies at which it communicates. And it produces a bit stream at roughly the rate of fiber optics, more than enough for quick downloads of movies and other digital data."

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