skippy786
Newbie   Posts: 1 Registered: 22/9/06 Status: Offline |
posted on 22/9/06 at 13:18
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Anyone know of a router that can get decent
signal through walls?
I'm going to be setting up a network with the
computer only about 30 feet from the router, but
with 2-3 nice big plaster walls in the way. Do
I have a chance?
Thanks.
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titillation
Junior Member  Posts: 7 Registered: 29/9/06 Status: Offline |
posted on 29/9/06 at 07:07 |
quote:
Anyone know of
a router that can get decent signal through
walls?
I'm going to be setting up a network with the
computer only about 30 feet from the router, but
with 2-3 nice big plaster walls in the way. Do
I have a chance?
Thanks.
There are powerline adaptors that can create a LAN
using your electricity mains in the house. That
might be an option for you - but they do not
always work between all connections. (Much like your
regular babyphone: might work down the street, but
not in the next room - only I think these
are build to absolutely not work in the down
the street scenarios) |
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Geocoorna
Junior Member  Posts: 16 Registered: 15/2/07 Status: Offline |
posted on 20/2/07 at 15:20 |
I have a $49 Linksys router in a corner room
of the house, and there are about 40 feet and
six plaster walls between it and the bedroom.
Out-of-the-box there was no way the signal could
reach.
I replaced one antenna with a 7dBm omni-directional
from D-Link, and made parabolic reflectors for it
and the remaining original antenna. Now the whole
house gets good to excellent service -- even the
upstairs!
An antenna solution is better than a stronger
wireless router, because a better antenna can both
send stronger and pick up the weak signal from
the other side of the bridge. ____________________
(((((zap))))) |
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rfengr
Junior Member Posts: 13 Registered: 8/11/07 Status: Offline |
posted on 8/11/07 at 17:23 |
Getting through plaster walls are a matter of
having enough RF power. A drywall takes about 6dB
to 10dB to penetrate. If your router is
transmitting perpendicular to the wall it takes about
6dB. If the transmission is skewed, it'll take
about 10dB.
The FSL (Free Space Loss) for 40 ft is about
-85dB. Let's assume that the transmit power of your
router is 50mW (+17dBm) and the antenna is
2.2dBi and the 1Mbps receive sensitivity is about
90dB. You have a link budget of about 24.2dB to
make the link, if there were no walls. The
walls will require an additional 36dB to 60 dB
to penetrate. Your net link margin is -11.8dB best
case to -35.8dB on the worst case.
From an RF perspective, I don't think adding a
higher gain antenna is going to work. You're going
to need a bi-directional RF power amplifier. The
amps are more costly than the Linksys router. You
might want to look at cabling if you don't want
to spend the money on the amp.
Good luck........RFengr |
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