Archived from groups: alt.internet.wireless (
More info?)
On Sun, 24 Oct 2004 16:18:47 GMT, "Jerry Kurata" <jerryk@nospam.com>
wrote:
>We are connecting two buildings about 200 feet apart. We will be using 2.4
>Ghz. Does anyone have any suggestions about the type of antennas to use?
>Low cost is important, but not if the solution does not work well.
At 200ft, almost any type of directional antenna will work. This
sounds like a commercial adventure, so I won't recommend any do it
thyself antennas. If you are impoverished, methinks an 8dBi panel
(patch) antenna is sufficient. I like Maxrad 9 ($25), 13 ($35), or
18dBi ($60) antennas because of the ease of mounting (swivel ball with
a hose clamp to a vertical pipe). If you're into 802.11g type
performance, your main concern will be to insure that you have a very
strong signal, with little interference from other co-channel users
located to the sides of the antenna pattern. If this is a tall
building, that has the potential to see other co-channel users, I
would make some effort to block the signal from other directions with
something absorbant (not reflective). Therefore, I would NOT suggest
you use an omni or yagi, but instead use a panel (patch) or dish
antenna. I can run a fade margin calculation to determine the minimum
required gain, but I need to know what you're working with, how long
the coax run, type of coax, expected speed, etc.
http://www.fab-corp.com/J1.htm
--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 AE6KS 831-336-2558