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Re: 2.4GHz QRM



5.8 and 2.4 GHz amplifier ICs in the 0.5-2 W range are less than $5 each and
the gain of a constant-aperture antenna compensates for path loss changes
with frequency.

73,

John
KD6OZH

----- Original Message ----- 
From: "Gregg Wonderly" <w5ggw@cox.net>
To: "AMSAT BB" <amsat-bb@AMSAT.Org>
Sent: Tuesday, August 01, 2006 14:07 UTC
Subject: Re: [amsat-bb] 2.4GHz QRM
>
> There are tremendous propagation losses for moving "up" in frequency to
5.8ghz.
>   The path loss is huge.  People already have problems with their 2.4ghz
wifi
> working in their houses/buildings well.  5.8ghz is worse, I had 802.11a
routers
> early on which worked very poorly, but that was early technology.  If they
> improve receivers and/or are allowed more power, they can perhaps meet
802.11b/g
> current performance.  Prices will be high for new gear.  People with
existing
> gear won't replace it to be nice to us.  The commercial wifi companies are
using
> some 2.4ghz long haul paths, out doors, making use of the FCCs narrow
beamwidth,
> above 21dbi gain allowance.  This puts very, very noisy, high power
tunnels over
> the cities.  If you are in one of these tunnels, you probably are going to
hear it.
>
> Gregg Wonderly
> W5GGW
> ----
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----
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