[MLB-WIRELESS] Wireless Cards

[Matthew Vella]

EIRP is Effective Isotropic Radiated Power.  Basically the amount of power
you would have to apply to a gainless, non-focused antenna (Isotropic) to
achieve the same result.

Some discussion here:
http://www.ece.wpi.edu/courses/ee535/hwk11cd95/jcard/sec2.html

18dBi antennas have a multiplying effect of about 64x the input signal
(ignoring cabling losses).

----- Original Message -----
From: "Derek Osborn" <derekosborn at optusnet.com.au>
To: "melbwireless @ melbwireless . dyndns . org"
<melbwireless at melbwireless.dyndns.org>
Cc: "melbwireless @ melbwireless . dyndns . org"
<melbwireless at melbwireless.dyndns.org>
Sent: Tuesday, October 23, 2001 12:58 PM
Subject: Re: Re: [MLB-WIRELESS] Wireless Cards


> I have a couple of modded 18dBi Galaxy Antennas.
> Im not knowledgable when it comes to RF so I have no idea what EIRP is. I
was
> under the impression that upto 4watt's could legally be used in the 2.4ghz
> spectrum ?
>
>
>
> > Matthew Vella <mvella at flexsoft.com.au> wrote:
> >
> > Errm, don't wish to sound picky here, but 24dbi gain is a multiplier
> > of
> > 256 - so 25.6W EIRP in your example!
> >
> > This assumes no loss in the cabling, of course :-)
> >
> > ----- Original Message -----
> > From: "Drew" <drew at wirelessanarchy.com>
> > To: <melbwireless at melbwireless.dyndns.org>
> > Sent: Tuesday, October 23, 2001 12:13 PM
> > Subject: Re: [MLB-WIRELESS] Wireless Cards
> >
> >
> > > most pcmcia cards have isa/pci adapters you can use, although there
> > are
> > > some straight pci cards, such as one model of the compaq's. nobody
> > > actually makes a 4W card, as hooking it up to any kind of antenna
> > would
> > > put you over the limit. ex. cisco 350 w/ 24dbi dish would be 0.1W *
> > 24 =
> > > 2.4W EIRP. You can get amplifiers to get closer to the 4W limit
> > though.
> > >
> >
> >
> >
> > --
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> > ess
>
>
> Regards,
>
> Derek Osborn
> LAN Support Specialist
> IBM Global Services Australia
>
> E-mail derekosborn at optusnet.com.au
> E-mail dosborn at au1.ibm.com
>
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