(Archive Copy) RE: [MLB-WIRELESS] 900MHz wireless LAN?

[Rowan Wainwright-Smith]

OK.... a couple of things that you also need to be aware of...

900Mhz is CURRENTLY USED by MOBILE GSM phone. (this is the old band!)

Most new phone are dual band. they also can use 1.8Ghz.

with 900Mhz..LOS is virtually not required.

Max effective performance on 900Mhz is with LOS.

Rowan

Tony Langdon wrote:

> > One of our local ISPs is starting to offer wireless broadband Internet
> > access in the 900MHz frequency range. Apparently it is not
> > necessary to have
> > line of sight to access this serviceon'tHow can that work?
> > WHat are the
> > propagation issues I don't know about here? What kind of
> > range is to be
> > expected (they have an omni antenna on their roof - I noticed)?
> > Cheers,
> > Joe
> > Bendigo
>
> The theory is rather similar to 2.4 GHz, except that the frequency is
> somewhat lower, which means the line of sight requirement is a bit less
> critical (though not eliminated).  You can get a range similar to 2.4 GHz,
> depending on terrain (as the path gets worse, 900 MHz becomes the better
> performer of the two).  Also not that available bandwidth is generally much
> less on 900 MHz.
>
> The power limit is 1W EIRP, if I recall.
> Typical bandwidth is several hundred kbps (don't know exact specs).
> Antennas can be omnis (easier to build here!) or Yagis (for directional).
> Dishes tend to be rather large and cumbersome at this frequency.
>
> Others will be able to add more to this bit of info.



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