Introduction: 2.4GHz Yagi in a Can

Yagi antenna for the 2.4GHz spectrum (Wi-Fi).  What’s different about this antenna is that it is inside a cantenna giving it more range by narrowing its beamwidth making it more directional than a standard Yagi.
yagi template:
A good Yagi calculator can be found here:
Copper foil tape:
The cantenna is made from a toilet brush holder. These seem to be a standard size but the dimensions are: 265mm length, 90mm diameter.
To test my antennas I use a test router 40 meters away with the signal going through three brick walls.

Comments (author)2015-07-24


Do you think it would A. help, B. hurt C. do nothing either way, if one were to put foil strips on both sides of the plexi glass?



midod (author)2015-04-11

can you Give me link Download template because it don't want to download please

Downunder35m (author)midod2015-04-23

There have been numerous requests for the correct dimensions or the download of the template, not just here but also in other place he posted it.

I guess you can assume that you won't get it as the file is set to view only.
For the same reasons I flagged it as incomplete as it is impossible to replicate, the risk of deep frying the WiFi adapter is too high.

Orugammy (author)2015-02-21

Can i use pvc pipe?

nuuser (author)2014-10-12

Love the concept, so I tried recreating this project with aluminium foil-tape, but my test results came out pretty weak, so I was wondering if you could publish the actual measurements, as I believe the pdf file is slightly off scale (yes I already tried playing with the print settings but no success so far).

I measured the thickness/width of the elements on the template and it was arround 5.72 mm, but the ebay link for the copper foil tape sells 6mm wide tape, so I guess my template is off?

I have also been playing around with several calculators and while getting some fairly close values...I would still love to compare them with your original numbers.

pGrnd (author)2014-02-19

Excellent idea, I am ready to boost my wifi. I have a couple of points

1 - Could you give exact measures from center of first element (the one replace by the can in your setup) and center of last element ?
I want to be sure, when printing, that the print is ok sized.

2 - how much signal do you think will lost without the can/brush-holder, and adding that first element as the other ones ? . A flat yagi is very much appealing for traveling

Thanks a lot !!

jkitchin (author)2013-11-17

What are the dimensions of the tube, if you please?
Thank You

andrew mcneil (author)jkitchin2013-11-18

95mm by 265mm
hope this helps

jkitchin (author)2013-11-17

Thank You.

zakengen (author)2013-11-12

it is a grate idea neat and clean . i wish if i can do it for 2.3 ghz

astral_mage (author)2013-09-23

can u use the same sticky copper thats used 4 stain glass windows makers?

sure should be fine as I believe they solder stain glass windows together it would probably be more durable.

About This Instructable




More by andrew mcneil:Double Crosshair Waveguide Antenna for 2 4GHzThe Circular Polarized Crosshair Antenna 2,4GHzCombining a Cheap Antenna and Nano Router
Add instructable to: