On Mon, 31 Oct 2005 16:35:59 GMT, Ciccio <ciccio.unico@libero.it>
wrote:
>I have ound this modding:
>http://www.nabuk.org/article.php?sto...40320104245591
>or:
>http://www.delink.it/modules/section...rticle&artid=1
>and i think to use in my dlink G650.
>The schematic is similar
>http://ciccioamore.altervista.org/1.JPG
That's not a schematic. It's also not similar to the above URL's.
There are numerous different suppliers of the DI-G650, 650+, etc.
Which picture resembles your card?
>and here i have some question:
>1)why there are 2 antenna?
> is it for switch diversity?
Yes. The odds are better that one or the other antenna will NOT be
sitting in a null (where the incident and reflected waves cancel).
>2)What's switch diversity?
It's where the radio section switches between the two antennas and
trys to determine which antenna is "best" for the connection to an
access point. It's very good for eliminating the effects of
reflections and multipath, but offers no additional gain. When
attaching to a single external antenna, the diversity switch should be
disabled, bypassed, or ignored.
>3)Why i must remove the small device (down antenna 2) and i cannot to
>knit in oter side where there is a free space?
I don't know what device you're refering to. However, let me point
out that exposed center conductor lead length is ultra-critical. Even
a few fractions of a mm will make a huge difference in loss. The idea
is to use the absolutely shortest length of exposed center conductor
from the coax and to use the most extensive and direct ground
connection available. Removing the device may also disconnect the
circuit board antenna from the transmitter, which is required for an
external antenna connection.
--
Jeff Liebermann
jeffl@comix.santa-cruz.ca.us
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060
http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
Help for modding Dlink G650 
Linear Mode
