Re: What dBi 120deg. sector can I use legally w/ 200mW AP? Some other questions too.

On Wed, 2004-04-14 at 14:38, Apollo (Carmel Entertainment) wrote:
> I am still in design stage of our non-profit apartment complex wireless project.
> Questions I have are:
i'm answering you because i just built something similar...
but i almost didnt because of the gratuitous cross posting

> 
> 1. What is the highest dBi 120deg. sector can I use with uamplified 200mW access
> point without breaking the law?
i don't know about this one... but google should help you here.
use site:lists.bawug.org - i remember seeing disuccsions about this.

> 
> 2. I wonder if I would be able to penetrate our stucture, so I could serve the
> units on the other side of the building without doing any APs on the other side
> (the light poles there belong to the city). What polarization should I use?

brick is tough...
if i were you I'd put the access points in the hallways every other
floor

> 3. Is one 120deg sector enough to cover a building that is about 80feet away
> from building that is 64'deep, 72'high, and 170'wide (and needs to be covered
> corner to corner)?
just do the trig.. it's pretty easy
tan 60deg *80 ~= 150 (that's from memory so check it)
so you cover a horizontal area of about 300 feet at that distance.
sounds like you'd be better off with a 90 degree antenna in that setup -
also the 12 feet high means you'll be putting a fair amount of radiation
into the ground - i think inside is a much better bet.

remember that it's not important how much power your transmitter has if
the clients only have 30mw - gotta talk in both directions.

good luck!

brad


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