Ingenious internet users have been using everything from kitchen foil and food strainers, to home made Yagi style antennas to boost their Wi-Fi ranges. This article has you covered. Read More your home Wi-Fi system without building additional hardware, there are simple DIY solutions that can also make a real difference to your surfing experience. Before you start though, make sure you have checked whether you have any other problems Increase the Speed of Your Internet Connection Read More with your Wi-Fi connection.
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Greg's obsession de' jour In my efforts to add the words "wireless savvy" to my network admin resume, I've been reading books and web pages on radio propagation, antenna theory and design, and building wireless networks with One of the first things that got me excited was the Pringles Can Antenna.
Published on the internet and in a fine book by Rob Flickenger , the net admin for O'Reilly , this design for a do-it-yourself, VERY inexpensive antenna made from a recycled junkfood container is as cool as the other side of the pillow.
It seems that everyone is building and using these. The various community wireless network groups all talk about them and folks are reporting that they do the job.
The Shootout My plan was to get relative performance measurements for various designs including mine of homebrew antennas for To do this, I setup a wireless link and changed only the antenna- recording each antennas' performance under identical conditions. I didn't compare them to a commercial directional antenna as my only one has a male connector and I don't have the right cable to hook it up yet.
The contestants were click on each for design specifications. The Performance Summary The results surprised me! In our test, the Flickenger Pringles can did a little better than my modified Pringles design. Both did no better than the Lucent omnidirectional. Now this is just on raw signal strength, noise rejection due to directivity still makes a directional antenna a better choice for some uses even if there is no gain benefit.
The waveguides all soundly trounced the Pringles can designs. I mean they stomped them into the ground on signal strength - as much as 9 dB better. Every three dB is a doubling in power - that's three doublings 8x increase! Of the waveguides, the Nalley's "Big Chunk" took top marks. It was followed by the Hunts Pasta Sauce, my modified coffee can, and the Flickenger coffee can in that order.
My three waveguide designs, which utilized the correct theoretical spacing, out performed the Flickenger Yuban coffee can handily. It seems that the design formulas for the waveguide design made a sizeable difference in performance. In the yagis, it didn't matter much. This could be because neither Rob's nor my designs are anywhere near right for optimum performance for a Yagi. I've decided that Yagi design is not for the timid or non-radio-expert.
With these results, I'm convinced that the waveguide design is the way to go for cheap wireless networking. The performance is good, the cost is very low and the skill required is minimal.
If you can eat a big can of stew, you can make a high performance antenna. It's the easiest antenna design I know of. Copyright Gregory Rehm - All rights reserved. For information about reproducing this article in any format, contact the author: greg turnpoint. A friend of mine built his before me and looking at his finished antenna got me excited to understand the theory of how it works.
Reviewing his plan, I came up with different spacing that he Rob did. To see if I could improve upon the design, I built mine with corrected spacing. While waiting for some wireless equipment to come in, I started looking for my next antenna project.
Oddly, the more I studied, the less I understood. There seems to be quite a bit of confusion on how the Pringles antenna works and what design category it falls under. The inner lining of a Pringles can looks metallic, but my tests show it not to be.
The Pringles Antenna design, and some designs that pre-date it, seem to treat it as though it were metallic. While folks are calling it a Yagi-Uda style antenna, the design of the driven element in the Pringles can antenna looks like a Waveguide style design.
Waveguide antennas don't use the director assembly the washery bits , and therefore are much simpler to build.
The math for computing correct sizing of the components in a waveguideWiFi antenna is simple. Formulas in hand, I started searching my cupboards for tin cans that fit the spec. I found myself staring at the products on the canned food aisle at the grocery store.
I even went so far as going grocery shopping with a tape measure. It's about three quarters of a wavelength in diameter, hon! On Feb 11th, Rob, posted an article on his newest homebrew WiFi antenna - a tin can waveguide! Rob used a large, 39oz. He reported good results - even better than the Pringles can design used by so many. For the antennas I was building, I was using different measurements based on the antenna design material I had been reading.
Now I'm a late entry into this wireless stuff and the experts are going a different way than me. It's time to benchmark. A commercial Lucent "range extender" omni directional A buddy's Flickenger-design Pringles can Yagi My modified design Pringles can A Flickenger design coffee can waveguide A coffee can waveguide with corrected radiator placement A Hunts
802.11b Homebrew WiFi Antenna Shootout
A cantenna a portmanteau blending the words can and antenna is a homemade directional waveguide antenna , made out of an open-ended metal can. Cantennas are typically used to increase the range or discovery of Wi-Fi networks. The cylinder portion of the can may consist of metal-coated paperboard. Although some designs are based on a Pringles potato chips can, this tube is too narrow to increase the 2. A more efficient cantenna can be made by minimising this length or connecting the cantenna directly to the Wi-Fi circuitry. Cantennas are typically used for extending a wireless local area network WLAN. The tiny design makes them ideal for mobile applications such as wardriving.
How To Make a Wi-Fi Antenna Out Of a Pringles Can