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Originally Posted by Civic Duty
I'm searching through everything I've learned so far in medical school and thinking about those electromagnetism classes I took way back when... how would this possibly work?
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I did a quick google search:
"The small keyless radio transmitters are *really* inefficient at
radiating electromagnetic waves, purely because they are small.
Efficient radiation of energy requires an antenna of one quarter of the
wavelength. Why? If you picture a wave, the maximum amplitude is one
quarter of the way along from the point at which it starts. Putting it
simply, that's what you want at the end of your antenna. That's why
model control transmitters, which use similar frequencies to
keyless control units, have long antennae attached to them.
When you put the device close to a conductor, the radio frequency waves
can couple to it and get a much closer match to a quarter wave. That's
why an FM radio can often receive a better signal if you touch the
antenna or even stand close to it. The same thing applies to a
transmitter - the technical term is that your body acts as a coupled
antenna more closely matched to the wavelength of the signal.
And, before the hysteria starts, it's absolutely harmless!"
And if you wanted to increase it further, hold the fob under your chin in one hand, and raise your other hand.