On Wed, 24 Sep 2008 22:39:23 -0700 (PDT), Penang
wrote:

My background isn't on antenna making, in fact, my training is in
Chemical engineering, not physics.

But lately I've spent a lot of times consuming materials I dig from
the Net about antennas, in the effect to learn how to make an
excellent (effective?) wifi antenna.

Specifically, my interest is in the "broadcast" type of antenna ...
trying to find a way to "extend" the range of a typical wifi
basestation using antennas alone (maybe with the help of MIMO
antennas), without "range repeaters" or whatnots.

My brain is now fully clogged, and I'm having difficulties digesting
all the stuffs that I've gotten.

So I desperately need you help.

Is there a place (a forum, a website, a tutorial, and whatnots) where
one can learn about antennas, without having one's brain clogged up,
like mine right now?

What's your suggestion / opinion on how to construct an excellent
(pair) of MIMO antenna for wifi (802.11 b/g/n) ?

Thank you all !
Yeah, you are welcome.

98% of all WIFI antenna tutorials on the www are bad,
unuseable or simply blatantly wrong. Their objects
(avoid calling them "antennas") have the functionality
of a bare piece of wire, which works also.

So I made a 100% WIFI antenna to have an object for a tutorial.
But it is not one of the broadcast type you requested,
I made a 10 turn 2,4 GHz helix with bandpass stub.

I just moved over to grab the camera for a quickie,
the antenna dropped down to the floor, the tripod
fell over my coffee and the cat jumped into my apple pie.

My scalar analyzer failed last week and is on repair,
so I cannot make the proofing screenshots: 50 Ohms over
the whole WLAN channels 1 to 13 with an SWR 1,5
(and the stub prevents overload by cellular & TV).

Why is everything that complicated?

w.