I checked the US spectrum allocation chart, there are some devices like
radar and satellite communication in the 5GHz bands.

Based on the comment of Cisco,
"It is generally true that fewer devices currently operating at 5 GHz are
causing interference as compared to 2.4-GHz devices. But this will change
over time. Just as everyone moved from 900 MHz to 2.4 GHz to avoid
interference, the "band jumping" effect will catch up with 5 GHz. Some
devices that already exist at 5 GHz include cordless phones, radar,
perimeter sensors, and digital satellite."

http://www.cisco.com/en/US/prod/collateral/wireless/ps9391/ps9393/ps9394/prod_white_paper0900aecd807395a9_ns736_Networking_Solutions_White_Paper.html

Guanbo


On Thu, Jun 7, 2012 at 12:47 PM, Sangho Oh <sangho...@gmail.com> wrote:

> It is well know that microwaves, bluetooth, cordless phones are the major
> interference sources in 2.4Ghz.
> But what devices (with non WiFi standards) are using 5Ghz band used by
> 802.11n devices?
> Specifically for 5180-5350, 5745-5805Mhz.
>
>
>
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-- 
Regards,
Brian
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