WiFi Directional Antenna Fix, From Aluminium Can.




About: I work in a D.i.Y style superstore. I am not sure if that is a good thing or not, but it certainly perpetuates my interest in such areas. I enjoy high powered devices of any kind. I do not give in, ev...

This is a simple device anyone can make, that should improve your reception quality and or strength.

An aluminium can is the basis for the design, therefore making this a very affordable project to try in your spare time... Goodluck!! :)

Step 1: What Is It??

To often these days our wireless internet connections are being corrupted by external influences, some of these are buildings,electronic interferances not to mention the rest..

This is a simple device made from any aluminium can (alcoholic preferably), cuts down on some of these and helps focus on a directional point..
This may not be applicable on many modem units..

Although I want to share this I also ask to you read the following. Just so we are clear.. :)

Warning: I am in no way responsible for any damage caused, by your using of this device in any way. You do this at your own risk. This will possibly void your warranty on your device and or render it unusable. It may also spontaniously combust and blow up everywhere causing damage to property which I am also not responsible for... YOU DO THIS AT YOUR OWN RISK!!!
Then again it may do nothing, because its just a sheet of aluminium... LoL

So lets get started!!
What will we need??

Step 2: What We Need-

~Aluminium can (I'm not sure why, but alcoholic beverages seem to work the best.{make sure you drink it before we start})

That's it... Did you even need to leave your desk..? LoL..

So we have what we need..

Step 3: Construction-

Low quality video, but you should get the idea..

Please use goggles and gloves... I have done this many times now for friends and family... As you can see from the video the can springs violently and will cut you..

1. Cut top and bottom off can.

2. Slice up one side.

3. Expand to relavent angle, close to 100mm diameter. The can starts at approx 65mm.

4. Cut an appropriate section out of the bottom edge to suit your antenna.

5. Add some tape to edges if desired..

Here is the video of the process.


And we are done with the unit...
Now for some fine tuning..

Step 4: Tuning-

Due to the individual characteristics of your WiFi antenna, you will need to tune you "dish".

This involves fixing it behind your antenna, then expanding and contracting the "gap at the front of the "dish".

If you have applications on you computer on signal and or strength, use them.
Apply the same rules as finding a suitable location for the modem. Take note of where the diameter of the can is giving the highest results.
Once you have noted this, remove the can and shape it to remain in that diameter... My sweet spot is an opening of 110mm and would be a good place to start, when tuning yours..

Step 5: Alcoholic Beverage- Why It Works Best??

There are two simple explanations why an alcoholic beverage works best.

1. The individual molecular build-up, of tiny particles of alcohol on the aluminium surface of the can react and form a unrecognised
bi-product. This phenomenum allows for perfect wave reflection. This surface is far superior to those used in common day and commercial practices..
I am happy to say I am the first to discover this super surface

2. Hopefully after making several mistakes and modifications to your dish, you have needed to drink several cans. So given your now totally pissed, any change we get can be thouroughly celebrated..!! ;)
If we are drunk and believing 1. then we are almost there

Step 6: So.... Did It Do Anything??

If your not getting a responce, try moving your "dishs" direction to point elsewhere...

If it doesn't work within an hour of fiddling... it probably means you antenna wont' respond to the dish behind it. Try going free-style and hold the dish in your hand around, to the side, infront, above, below the antenna etc... the reflections may assist reception too...

Goodluck and I hope this brings you as much happiness as mine has...
Yay no more "red" signal and only green now!! ;)

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    15 Discussions


    5 years ago on Introduction


    Wondering if anyone had tried a vehicle headlight lens assembly. Would be nice if there exists a 3.25 inch headlight lens with replace-able bulb so you could insert a usb wifi dongle.


    10 years ago on Introduction

    I tried this just after picking p a $35 NetGear G router. I had 1-2 bars across the entire house, through many walls from my desktop. Now, thanks to this simple and inexpensive creation my signal has been boosted 2x stronger to 3-4 bars. I pulled my own tweak on it though by increasing the angle from 100degree to about 130degree as my guesstimate. Over all, like it!

    1 reply

    Reply 10 years ago on Introduction

    I am glad you found this of assistance. The angle suggested is also just a rough guide. the exact angle will depend on your individual device. I have also had alot of interest in the unwired internet community. (The modem pictured is the Unwired wabbit) Without this lil' device I am unable to connect to the internet. Thanks for your comment. Perhaps I should be contacting NetGear??!! ;)


    11 years ago on Step 2

    it didnt work with my indor antenna which is a philips 310f and a 12 db 50 - 900 mhz am/fm-tv(uhf /vhf) signal ampifier any suggestions I miss ion tvstaion channel 54 here and wbn and wgn?? anyone got any ideas?? email them to me personally at this email address with the subject of television antennas truckinforjesus@windstream.net

    2 replies

    Reply 11 years ago on Step 2

    Do you have a directional signal being sent from a single location? Or is it from multiple signal points? Open the can up the a flat sheet, hold next t antenna, let it naturally spring close slowly while holding very still, if there is no responce then forget my method. Are external antennas not a possibility to you?


    Reply 11 years ago on Step 2

    ok i do have multiple directional signas if that means that I am tying to ick up several staion with the same antenna. lol on the opening the can up the flat sheet ive already tried that lol and my amplifier is an electric one which is abt 3 feet away from both antennas. On the possibility o exteral antennas ...weeell lol to me yes even though id rater not (ill expain in a minute), but no they're not really a possibilty anyways cuse m livin with my mom in her trailor on my land... k now for the explanation lol i know im typing a book already so ill ty and make it as shor as posssible te reason i can but cant and ould rather not is because lightining can and will strike outside antennas epecially if they are electrc or steel and some types of alumminium, and this would bea major disaster for us as we can not an do not have any insuranc on the land or the mobie home in which the antenna would be feeding to ..... i know i know lol everyone says attach a grounding rod to it and that will eliminat the lightinings effect on any house and tv damages ....Nope been there done that ad my 2 story home to complety burn down even with a lightining ground rod attached to my old 50 foot ham/sw/tv/fm antenna. thats why im really leiry of outside antennas now and stick to small indoor ones...however I would like to make or find a free antenna that looks like thi to use for my tv in case this confuses you i will include a link to show it in complete view and better details for you ||-| |-|| | | | I want to be able to get channels 10,12,18,20,21, 3848,54,and tbn which i think is channels 75 ad or 78 on uhf one of these should do it but so far i have 3 atennas bought and not a one will get them and 1 of them says that it will pick up uhf stations 14- 95 and it doesnt not even with my amplifierhooked up to it

    1390_detail.jpghd uhf antenna only ch 16-69.bmphdtv uhf antenna.jpg

    I've been reading a LOT of this WiFi stuff here on our extraordinary Instructables.com and was wondering if anyone has tested the strainer method against the coffee can or pringles method and also against using an old directv satellite and such. Which one would give me the best reception? I'm guessing the satellite dish but I am new to this. TIA!

    1 reply

    Reply 11 years ago on Introduction

    Depends if you are wiring it up as in the terminal, or just using the dish to refract like mine does. Coffe can and pringles have their downside as they only recieve a small amount of signal sent, yet of that next to none is lost... Preferable I prefer to use my method as it direct a small percentage that would normally by pass the aerial towards it. It however does not block any signal out like the cantenna.. Hope that was help full..


    11 years ago on Introduction

    Looks good, but can you embed your video instead? More people will be able to watch it. Instructable on the subject here.

    1 reply

    11 years ago on Introduction

    3: Beer cans are taller than coke cans so provide more reflector surface 4: Beer is (I believe) less acidic than coke so beer cans may have a different makeup, eg more steel/less tin/less aluminium/less plastic coating on the inside/whatever else that improves its reflectivity 5: Drinking one can of beer has a mild depressive effect on your nervous system, reducing slight natural (or coffee-induced) shake in your hands, so you can hold the reflector more steady and get a clearer signal :) Any other questionably scientific pseudo-explanations around? I've already tried this with a 330ml can but it doesn't fit around the tiny antenna on my PCI wireless card :(

    1 reply

    Reply 11 years ago on Introduction

    Bad luck on the, not fixing your antenna...

    Sounds like you have been experimenting too....
    Had any luck??
    I like your pseudo-explanations for the alcohol... LoL... fantastic!
    Nice to see someone else shares my sense of humour... ;)