"Bryce" <(E-Mail Removed)> wrote:
>Does replacing the 2 or so dbi antennas with 7 dbi antennas do anything? Can
>I get more range?
Twice as much power is 3 dB, 4 times as much power is 6 dB. You aren't
getting quite 4 times as much power by using a 7 dBi antenna in place of
a 2 dBi antenna.
>What affect do bigger antennas on the same power transmitter do?
They will improve performance. One big advantage of investing
in antennas is that it improves the transmit power in any given
direction, and it also improves the receive sensitivity.
(Unlike raising the power of the transmitter, which has to be
done at both ends of a link to be effective, a better antenna on
only one end of a link benefits both transmit and receive).
>Will it go farther in my house and just have more throughput, given the same
>distances?
Depends. If your AP and Client are sitting 20 feet from each
other, with nothing between them, and you have a received signal
of -40 dBm, and improvement of 5 dB to -35 dBm will have *no*
effect. In either case the link will be able to operate at its
maximum bitrate.
But if your Client is two rooms away, and the signal is -83 dBm
because it either doesn't go through the walls well or is
actually bouncing of the metal building across the road... you
won't be getting the maximum bit rate, and increasing the
received signal level to -78 dBm will probably cause a higher
bit rate, and will certainly result in fewer dropouts and
slowdowns when things change (someone walks through your path,
for example). And ultimately, it extends the distance at which
you can no longer get any kind of a reliable connection.
--
Floyd L. Davidson <http://web.newsguy.com/floyd_davidson>
Ukpeagvik (Barrow, Alaska)
(E-Mail Removed)
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