estqwerty’s wifi antennas

On wireless.com.pt forum I found very interesting article - there are some em simulations of this famous russian antenna. Interesting is that the auhtor made several test with different number of radiating elements.

This is FA20 original design :

Next is with 12 patches :

And finally 16 elements :

Here are results for swr in different simulations :

VSWR 8 Dipoles –> minimum at 2.44ghz 1.46; from 2.4 to 2.5ghz <2.5
VSWR 12 Dipoles –> minimum at 2.45ghz 1.89; from 2.4 to 2.5ghz <2.8
VSWR 16 Dipoles –> minimum at 2.44ghz 1.96; from 2.4 to 2.5ghz <3.4

SWR results are not very good

This may be due to a different dimensions used by fable to test this design.

He also used very interesting metod to build and test this design. He used aluminium foil and cardboard.

Are You remember this one : http://www.digdice.com/?p=138

This looks very crazy, oddly promising 18 dbi gain.

BUT now there are more info about this, as promised by admin of the GUW forum.

Here is all info in spanish :

http://www.guw.cl/sitio/index.php?option=com_content&task=view&id=110&Itemid=36

The author of this one is Ross Anderson and the original idea for this antenna is from 1984 year the good thing is that all the information about this one is here.

There is interesting version of this antenna build by the author. On his site he describes the how to build this panel antenna from zing fence. The original 2400mhz version is here : http://home.comcast.net/~ross_anderson/2400MHzAntenna.htm

The idea and the info : http://home.comcast.net/~ross_anderson/CurtainQuad.htm

Here some pictures from the em simulation from GUW site :

So as I see this, I can accept that this antenna works. On the site is said that this antenna outperform many commercial ones.

The diagram of this antenna and look from in front :

More pictures of this antenna build and tested for 1296Mhz and 2400mhz :

Interesting about this is the using of speaker wire for matching transformer :

“… Solder a 1+ inch piece of speaker wire to the N connector. One wire goes to the center pin; the other wire to the outside part of the connector. I drilled a small hole in the connector flange for the wire to be inserted into and soldered in place. Leave about 3/4 inch of insulation on the speaker wire (as measured where the two wires are together). This is the transformer, transforming the antenna impedance to about 50 ohms.”

There is also PDF tutorial on the GUW site : guw panel 18dbi.pdf

So this is promising design which I should test soon too. Will be interesting to find out will this design works if it is printed on PCB?

During the summer i found a lot of interesting/crazy/wired things, here is the first one :

It promise 18dBis but no more info about this one - no links, no nothing. If anyone can recognize this let write me a mail please.

link for this one :

http://www.guw.cl/sitio/index.php?option=com_content&task=view&id=92&Itemid=1

heinkel111 from the www.zero13wireless.net/foro/ was able to make array of two smc 11 panel antennas.

In this setup heinkel111 gets 14dbi.