Absolute BS!!
Tell me, sir, what is the approximate size of a water molecule?
Lessee...f/300=wavelength in m,
so, ummmm 2.4 GHz is ~13cm. Water is measured in nM, if memory serves me
correctly. You need to learn some radio theory....basic stuff man. As I
stated earlier...2.4GHz is not prone to vapor attenuation, and since
your devices aren't designed to radiate more than a few hundred
feet...unless you were in an exceptionally
dense vapor (IE under water), water isn't going to contribute more than
.1dB to your system losses. Your
neighbours microwave oven will cause more loss at your receiver than water
ever will. Period.
The reason 2450MHz is unlicensed is purely due to it's proximity to ISM,
Industrial, Scientific & Medical
devices (IE wood dryers, diathermy and sounding devices). If you were a
ham, you'd know this. Since your
not, your off the hook on the history lesson, but not the theory. You want
a rant on wave propagation vs
frequency/air+water content?
Microwaves do not "set up" an electric field in the oven. Oy! Nothing
vibrates either. Cripes, wtf are they
teaching for physics theses days?
If you all would like a lesson some Thursday on Radio Wave Propagation 101,
I'd be happy to sit
with you until you know what you're talking about. If not, please by all
means do some homework and
prove me wrong. There are plenty of good references available. I'll lend
you whatever you need from
my radio library. See esp. ARRL Handbook, Radio Engineering, Terman,
Practical Antenna Considerations, Jasik,
etc, etc.
jk
At 10:34 AM 1/29/2001, you wrote:
>The resonant frequency of water is right about 2.4Ghz. This is the reason
>the 2.4ghz band (+/- 50Hz from 2400Hz) is unlicensed.
>
>The water molecule can be conceptualized as a mickeymouse molecule, with a
>big oxygen atom, and two smaller hydrogen atoms sticking up like MM
>ears. It does not sit in a balanced structure.
>
>Microwaves work by setting up an electric field inside the oven. This
>electric field (operating at about 2.4Ghz) tickles the water molecules,
>causing them to vibrate more, thus elevating the tempurature of the water
>(or food, etc).
>
>I don't know if rain is a sole cause of 2.4ghz communications being
>dampened. From speculation, I suppose it's possible.
>
>Cory
-----------------------------
James S. Kaplan KG7FU
Eugene Oregon USA
[EMAIL PROTECTED]
http://www.rio.com/~kg7fu
ICQ # 1227639
Have YOU tried Linux today?
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