Extend Your Wireless Network with a DIY 2.4 GHZ WiFi Cantenna

Your wifi cantenna is now ready for use. Enjoy!

Extend Wifi Network with a 2.4 Ghz Cantenna

Extend Wifi Network with a 2.4 Ghz Cantenna

In order to test the results of my new wifi cantenna, I used netstumbler. Here is how I measured the gain. I started up my laptop aprox. 50 ft. from my access point. and let netstumbler take some readings. In the image below, these readings are labeled “Wifi Card No Ant.”. Then I quickly connected my wifi cantenna, which was pointed at the access point. The resultant rise in signal is the gain of the wifi cantenna.

As best as I can tell from the graph, the readings are as follows:

Extend you Wifi Network With a Cantenna

Extend you Wifi Network With a Cantenna

Wifi Card No Ant. = -74 DBm
Wifi Card with cantenna = -57 DBm

Which gives a gain of 17 DBm. Not bad for about $10 of materials, and perhaps an hour of time!

What I would like to do now is address some common questions people usually have with reguard to my wifi cantenna.

Q: If I build one of these do you think it will reach XYZ distance? (how far will it go)

A. That is a tricky answer, with too many variables. such as, is the other end a “clear line of sight”, In other words, can you see it? What about trees and walls and such? All of these things seriously degrade the signal. Unless you have thousands of dollars of test equipment to test your signal path, I suggest you just build one of these and try it.