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?
2 comments:
Nice blog as for me. It would be great to read something more about this theme. The only thing I would like to see on that blog is some pics of any gadgets.
Katherine Trider
Phone jammers
I bet that most of the bosses have already realized this problem. The employees become less concentrated on their job due to the fact that part of their attention is spent on constantly checking their cell phones for texts or social media feeds. As a result, employees’ productivity is reduced to a great extent and even severe mistakes can be made.
Pinabel Aubin
cell phone blocker
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