60 GHz Technology

[James Wolf]

They don't have to be that big.  Oxygen molecules interact with
electromagnetic radiation and absorb the energy. Even though a wavelength
might be around 0.1 inch it does not mean that it is transparent to
resonance. Resonances occur 24 GHz for water vapor and 60 GHz for oxygen.
But then rain trumps both.

Jim, KR9U


-----Original Message-----
From: tacos-bounces+jbwolf=comcast.net at amrad.org
[mailto:tacos-bounces+jbwolf=comcast.net at amrad.org] On Behalf Of Phil
Sent: Thursday, July 05, 2012 8:04 PM
To: Tacos AMRAD
Subject: Re: 60 GHz Technology

Water does not contain oxygen molecules.

Molecules do not absorb EM radiation on the basis of size.

As you say, molecules aren't that big.

Science of article = BS.


Phil M1GWZ




On 5 Jul 2012, at 21:56, Robert E. Seastrom wrote:

> 
> Quoting the article:
> 
>   Attenuation is also aggravated by H2O absorption. Water (mainly oxygen
>   molecules) in the atmosphere absorbs radio waves since the signal
>   wavelength is about the size of the oxygen molecules. This absorption
>   effect peaks at 60 GHz, making this a real issue for longer-range
>   applications.
> 
> 60 GHz = 5mm wavelength.  Them's some mighty big oxygen molecules.  :-)
> 
> -r
> 
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