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RE: Ricochet and various wireless (was: Re: [PLUG] key-signing Thursday?)
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Okay. Now, let's consider the surface area of a typical
Microwave....say 8"x14" = 722.5 cm2. High limit, therefore is : 3.6
W. Low limit is 722.5 mw.
Now,
is that leakage just for the door or for the entire device? If the later,
and the oven is 10 inches deep, we have a total surface area of: 3,251
cm2. This increase maximum output to just over 16 watts. That's
pretty substantial leakage.
Both
are substantially higher than then 100 mW output of these devices. Now, if
I remember correctly, RF signal strength is measures at 1 meter from the RF
source. With an omnidirectional antenna, the RF power dissipates at rate
inversely proportional to the distance. Thus, at 2 M, the RF power is 25
mW.
I
wouldn't be concerned.
Here's one for you:
"The FDA regulations requires new
oven manufactures to limit radiation leakage to less that 1 mW/cm2. Any
leakage that exceeds 5 mW/cm2 at a distance of 2 inches from a microwave
oven is prohibited. (FDA Part 1030. 10c)"
What is the
radiation level of a 100mW NIC at two inches?
Here's a quote
for you:
"The signal's 2.4GHz microwave frequency
matches the resonance frequency of water and ice. The signal swiftly loses
strength when passing through the hotel walls, says Sylvan, expending its
energy on heating up the water. A microwave oven operates on the same
principle, he explains, although with the power levels used by the
Spectrum24 network equipment--100 milliwatts, compared to 1,000 watts or
more for a microwave--there's little danger that ordering a vodka tonic will
melt a hole through the building. "
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