On Mon, 13 Nov 2006 21:37:25 -0800, g <wh@t.me.worry> wrote in
<45595634$0$34512$742ec2ed@news.sonic.net>:

>John Navas wrote:
>
>> The empirical studies I've seen are anything but conclusive.
>
>I don't know what studies you are referring to but
>http://www.radyn.com/Papers/gmc/Foliage_Attenuation.pdf might interest you.

I'm talking real world surveys of signal propagation in various
environments, particularly urban settings.

>This is particularly a millimeter wave study but pages 8-9 and
>particularly paragraph 4 on page 9 are relevant and compare results from
>several studies which were within 1 dB of each other.
>
> From these, I would say it is conclusive that there is a significant
>frequency dependency to attenuation through foliage.

Sure, but that's only a small factor in very complex circumstances. On
the other hand, higher frequencies are generally better at penetrating
smaller openings. Etc. That's why it's not valid to generalize from
limited data

--
Best regards, FAQ FOR CINGULAR WIRELESS:
John Navas <http://en.wikibooks.org/wiki/Cingular_Wireless_FAQ>