Re: WiMAx and BreezeMax

"Dean Reardon" <[email protected]> wrote:
>  
> Would just like to know if anyone has had any thing to do or has used,
> commissioned or other WiMax or BreezeMax NLOS networks? If so, what are
> their comments on it or does anyone have any comments on the Pro's and Con's
> on the technology.
> Interesting to get your point of views after all the hype
> Dean
> 

What's confusing to me about 802.16 (or WiMax, if you like buzz words) is the claim
of up to 50km/30miles in range.

The range of an EM wave depends on the power the wave was transmitted and
the sensitivity of the recieving antenna. In a vacuum the distance is infinite. 

Also, part of 802.16 will be operating in the 11-60GHz range and signals attenuate more rapidly
at higher frequencies. I'm not an expert but there's something called "skin depth" which
is the distance in which the wave loses 1/e power (about a third). This is approximately wavelength/2*pi
for a non conducting medium (such as air). So the attenuation for higher frequencies is much greater.

Baz



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