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Old 05-15-2010, 10:26 AM   #27 (permalink)
dcb
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Quote:
Originally Posted by NiHaoMike View Post
If you use existing radio stations... but it helps.
A typical high power AM station putts out 50000 watts, or 67 horsepower, that is radiating out in three dimensions. The power available to a given sized antenna (say car sized) is a rapidly decreasing fraction of that as you get farther from the transmitter.

If I figure it right (no promises) a saturn sw2 sized rectangle could at most see 1%. or 0.7 hp at 17 feet from the antenna! It gets worse at an accelerating rate the farther you get.

I mean the inefficiencies are obvious, right? We aren't seriously considering wireless en-mass for powering vehicles, for convenience, are we?
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