[BC] Long-range WiFi

[Tom Spencer]

Actually, it's set by the EIRP:

 From the source linked previously....

" How much power can I transmit on a 2.4 GHz, 10 dBi omni antenna and 
still be legal?

The FCC regulations for Point to Multi-Point allows only 36 dBm (4 
watts) EIRP.[...] "

and

" How much power can I transmit with in my Point-to-Point system?

According to FCC regulations, 2.4 GHz Part 15.247 point-to-point 
transmitters may use a 30 dBm transmitter with a 6 dBi antenna. For a 3 
dB increase in antenna gain, the transmitter power output must be 
reduced by 1 dB. [...] "

with a table of typical values...

Which I note gives an EIRP of 25 watts EIRP for a 18-dB antenna (26 dBm 
/ ~300 mW) TPO.

The one-watt (EIRP, not TPO) limit is at 5.3 GHz...

at 5,8 GHz, it's really interesting -

Omni's are limited to 4 watts EIRP, regardless, while point-to-point 
links are only limited to 1 watt TPO - the EIRP can get as high as 200 
watts with a 23 dB gain antenna...

a 30 dB gain antenna similar to the Prairie Technologies one would yield 
about 1 kW EIRP.....

HTH!

Dana Puopolo wrote:
> Nope. The TPO limit is one watt. It's all here:
>
> http://www.wlanantennas.com/faq.php
>
> -D
>
> From: rj carpenter <rcarpen at comcast.net>
>
> Dear Braintrust,
>
> I must be completely wrong, but I read things as saying that 100 mW max
> ERP is the limit for 802.11 b/g.
>
>
>   

-- 
Tom Spencer
PG-18-25453 (nee' P1-18-48841)
http://radioxtz.com/