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: https://docs.google.com/file/d/0BzmJxxD-Z4B6WEVnUFN6V2pRMEU/edit?usp=sharing
A good Yagi calculator can be found here: http://www.changpuak.ch/electronics/yagi_uda_antenna.php
Copper foil tape: http://www.ebay.co.uk/itm/360430320375?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
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

tp.pa.12 (author)2015-07-24

Andrew,

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?

Thanks

Tp

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.

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