Posts Tagged ‘ross anderson’

Curtain Quad Panel Wifi Antenna 18dbi

Thursday, September 27th, 2007

Are You remember this one :


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 :

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 :

The idea and the info :

Here some pictures from the em simulation from GUW site :

18dbi wifi panel antenna

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 :

18dbi wifi panel antenna cheap homemade diy diapositiva5.jpg

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?