The UK Home Automation Archive

Archive Home
Group Home
Search Archive


Advanced Search

The UKHA-ARCHIVE IS CEASING OPERATIONS 31 DEC 2024


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: How geographically big can a Wireless LAN be?


  • To: ukha_d@xxxxxxx
  • Subject: RE: How geographically big can a Wireless LAN be?
  • From: Andy Laurence <andy@xxxxxxx>
  • Date: Mon, 16 Sep 2002 10:54:25 +0100 (BST)
  • Mailing-list: list ukha_d@xxxxxxx; contact ukha_d-owner@xxxxxxx
  • Reply-to: ukha_d@xxxxxxx

On Mon, 16 Sep 2002, Gerard McGovern wrote:
> > In a recent post on UKHA_Buy, the following statement was made about
> > 802.11b Wi-Fi compliant PCMCIA cards.
> > "With 24 dbi antennas at both ends, I have gone 8 miles with no
> > problems"
>
> Someone please feel free to correct me, but isn't something that is a
> good transmitter also a good receiver? This is the principal of mobile
> phones and base stations. Base station very hi powered, mobile phone
> not.

Correct.

> So in theory, you just need one decent antenna because if it can
> broadcast that far, it should also receive that far? But then again, you
> could use two antennas to meet in the middle and I have just
> contradicted what I first said.

Sounds like you've answered your own question ;-)

To go a certain distance, you need a certain amount of gain.  This must be
distributed between the communicating radios.  For the sort of distances
mentioned, you will need an amount of gain at each end.  Last week, we
were going 70 yards through buildings using a 6dB panel antenna (1dB for
the connector puts us on the legal limit) at one end, and a standard card
with no external antenna at the other end.  We were quite chuffed :-)

Andy
--
Building a wireless community network for Bristol
http://consume.andylaurence.co.uk - updated 14/09
4x4 in town - bog brush for your teeth
NB: Alternate E-Mail - andylaurence at yahoo dot co dot uk



Yahoo! Groups Sponsor
ADVERTISEMENT

http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx
Subscribe:  ukha_d-subscribe@xxxxxxx
Unsubscribe:  ukha_d-unsubscribe@xxxxxxx
List owner:  ukha_d-owner@xxxxxxx
List of UKHA Groups here - http://groups.yahoo.com/group/UKHA_Grouplists/


Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.

Home | Main Index | Thread Index

Comments to the Webmaster are always welcomed, please use this contact form . Note that as this site is a mailing list archive, the Webmaster has no control over the contents of the messages. Comments about message content should be directed to the relevant mailing list.