802.11g

Can someone tell me the precise frequency for the 802.11g system? I
want to get hold of a Yagi antenna to enable me to receive signals
from a router in another building about 850 metres away. I am having
a problem sourcing such an item.

--
Alasdair.

"Alasdair" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Can someone tell me the precise frequency for the 802.11g system? I
> want to get hold of a Yagi antenna to enable me to receive signals
> from a router in another building about 850 metres away. I am having
> a problem sourcing such an item.

2.4 - 2.5 GHZ
I thought it operated in steps/channels, so can be on any frequency
within that range?

On Wed, 12 Sep 2007 13:01:57 +0100, Alasdair <(E-Mail Removed)>
wrote:

>Can someone tell me the precise frequency for the 802.11g system? I
>want to get hold of a Yagi antenna to enable me to receive signals
>from a router in another building about 850 metres away. I am having
>a problem sourcing such an item.

http://www.wifigear.co.uk/viewProduc...9-22BD3BBC0CB5

http://cgi.ebay.co.uk/18dBi-Yagi-Ant...QQcmdZViewItem

http://www.radioworld.co.uk/~radio/c...1g-p-4727.html

http://www.wsplc.com/acatalog/SHF_MF...-2485MHz_.html

http://www.solwise.co.uk/wireless-ou...-yagi-14yn.htm

"Gonz" <T o p @ S e c r e t . c o m> wrote in message
news:8GQFi.23148$(E-Mail Removed).. .
>
> "Alasdair" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>> Can someone tell me the precise frequency for the 802.11g system? I
>> want to get hold of a Yagi antenna to enable me to receive signals
>> from a router in another building about 850 metres away. I am having
>> a problem sourcing such an item.
>
> 2.4 - 2.5 GHZ
> I thought it operated in steps/channels, so can be on any frequency within
> that range?
>

Google for cantenna for lots of information including how to make your own
aerial.

"Alasdair" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Can someone tell me the precise frequency for the 802.11g system? I
> want to get hold of a Yagi antenna to enable me to receive signals
> from a router in another building about 850 metres away. I am having
> a problem sourcing such an item.
>
http://en.wikipedia.org/wiki/802.11g#802.11g

"Alasdair" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Can someone tell me the precise frequency for the 802.11g system? I
> want to get hold of a Yagi antenna to enable me to receive signals
> from a router in another building about 850 metres away. I am having
> a problem sourcing such an item.

Wifi is uses a spread-spectrum technique and is not a narrow-band
signal with a single precise carrier. The so-called channels overlap
big-time with "g"

Midband is about 2.45 Ghz and I imagine that will be the figure you want.
There are plenty of ready-made 2.4Ghz aerials out there specifically for
wi-fi, why don't you let the manufacturers worry about the specs?

--
Graham.
%Profound_observation%

"Alasdair" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Can someone tell me the precise frequency for the 802.11g system? I
> want to get hold of a Yagi antenna to enable me to receive signals
> from a router in another building about 850 metres away. I am having
> a problem sourcing such an item.

Necessitates eating a can of Pringles )

http://www.oreillynet.com/cs/weblog/view/wlg/448

"Gizmo." <(E-Mail Removed)> wrote in message
news:GXYFi.40471$(E-Mail Removed)...
>
> "Alasdair" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>> Can someone tell me the precise frequency for the 802.11g system? I
>> want to get hold of a Yagi antenna to enable me to receive signals
>> from a router in another building about 850 metres away. I am having
>> a problem sourcing such an item.
>
> Necessitates eating a can of Pringles )
>
> http://www.oreillynet.com/cs/weblog/view/wlg/448

When we are shopping, while SWIMBO is buying groceries, I have been
taking an unhealthy interest in toilet-brush holders.

--
Graham.
%Profound_observation%

"dennis@home" <(E-Mail Removed)> wrote in message
news:fc8lpl$i28$(E-Mail Removed)...
>
> "Gonz" <T o p @ S e c r e t . c o m> wrote in message
> news:8GQFi.23148$(E-Mail Removed).. .
>>
>> "Alasdair" <(E-Mail Removed)> wrote in message
>> news:(E-Mail Removed)...
>>> Can someone tell me the precise frequency for the 802.11g system? I
>>> want to get hold of a Yagi antenna to enable me to receive signals
>>> from a router in another building about 850 metres away. I am
>>> having
>>> a problem sourcing such an item.
>>
>> 2.4 - 2.5 GHZ
>> I thought it operated in steps/channels, so can be on any frequency
>> within that range?
>>
>
> Google for cantenna for lots of information including how to make your
> own aerial.

Thanks Dennis, but I'll leave the nerdy stuff for the nerds )

"Alasdair" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Can someone tell me the precise frequency for the 802.11g system? I
> want to get hold of a Yagi antenna to enable me to receive signals
> from a router in another building about 850 metres away. I am having
> a problem sourcing such an item.
>
> --
> Alasdair.


It is in a band around 2G4Hz to 2G5Hz. A single aerial will do very well.
They are probably available commercially.

If the router is shared then you only want a Yagi at one end, however for
850m with the powers available you probably want a Yagi at both ends for a
reasonable data rate.

General tips at this frequency.

1. Keep RF leads short, neat, thick and continuous. e.g. CT167 on
F-connectors.

2. Use horizontal polarisation - most wireless routers will have vertical
aerials, so this will hugely reduce interference.