Wifi Legal power limit help!!

[Kromas]

250m ... go into overkill mode and buy two Ubiquiti Nanobridges (NB-5G25). Im using these bad boys all over the new eskom power station we are building. Out of the box the seem to be able to penetrate straight through the massive tower that just got popped in front of our offices and another site 2kms away. Then again they do come in pricey.

[Diabolix]

dade the antenna is a normal omnidirectional 16dbi antenna will post link as soon as im back home lol

16dBi OMNI, that thing must be huge.

[AntiMiracleMan]

ok as fate has it... my router packed up... lol now the search goes into an access point... Any ideas ???

[AntiMiracleMan]

http://edup.en.alibaba.com/product/5...er_Router.html

Heres the link to the antenna.. its not that big... i know they say 22dbi but i saw max gains of between 14 - 18 dbi... also its not an external antenna and was cheap its actually not a bad buy dont know if i am going for a different antenna.. the search is now on for access point... as my router packed up

[warwickw]

a 2.4ghz 22dbi antenna would be about 2m in length if not longer. It's physically impossible for a 22dbi antenna to only be 41cm. Sounds like a backyard china manufacturer...

[AntiMiracleMan]

a 2.4ghz 22dbi antenna would be about 2m in length if not longer. It's physically impossible for a 22dbi antenna to only be 41cm. Sounds like a backyard china manufacturer...

Agreed... after testing it its more along the 14dbi range (tested on inSSIder and stable test bench) was cheap and was more of an experiment... worth the R70 odd bucks spent on it but certainly not 22dbi... not even close

I still cant put my head around a higher mw with smaller antenna or a smaller mw with higher dbi antenna...
Need a new access point... EnGenius has a 200mW one for about R800 retail... but thats over the icasa spec...

[AntiMiracleMan]

just to put the record straight on the 22dbi antenna i got that to compare it to the normal 5 or 7dbi antenna you got with the router... i got a gain of about 7 to 9 dbi more than with the stock antenna

[Trybble]

I still cant put my head around a higher mw with smaller antenna or a smaller mw with higher dbi antenna...

That's easy. Lower transmit power and higher-gain antenna. Reason? Well, remember that antenna gain works for both transmit AND receive. If you can't push the signal over the distance, pulling it in may well be the answer.

*Trybble.

[AntiMiracleMan]

Thx Trybble..
End of the day its still a radio signal.. gotta respect the boundry of the antenna

[AntiMiracleMan]

Ok here is my final setup... opted to go for the 54mbps TP LINK 26dbm unit 400mW of pure power aerial i reverted back to my DIY BIQUAD antenna Gains on my test bench...

SAME DISTANCE AND SAME SOURCES. 30M thru 3 walls
300mbs 802.11n netgear AP = -48dbM
54mbs TPLINK 400mw AP = -18dbM

you do the maths... Cant wait to get my DIY aerial on the roof.... also had a walk to other side of the house... even through
4 walls i couldnt get the speed to drop below 54mb's... even an attemp to duck behind my wifes car didnt drop the signal.. 54mb.s with all the bars green.. super excited!