60 GHz Technology

[Phil]

I'm not saying that 60 GHz radiation isn't absorbed. I'm saying that the supposed science of the article is completely wrong. The same would be true if I read an article saying that the reason there are no dinosaurs is that 99.9% of them were taken away by aliens. I'm not querying whether or not the dinosaurs had disappeared, only the mechanism.

Phil M1GWZ



On 6 Jul 2012, at 03:33, James Wolf wrote:

> 
> 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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