Parabolic Wireless Antenna
Parabolic wireless antenna is probably the simplest among wireless antennas to build. The result of parabolic wireless antenna is quite impressive whereby it can go boost up to 6dBi wireless signal. The most important thing is we don’t need to hack or modify our wireless router or USB wireless adapter in order to get the better signal. The cheapest method complete a parabolic wireless antenna is by using Aluminum foil. To get the maximum performance of your parabolic wireless antenna, you must know where the focal point is. My method to find the focal point is by using torch light. Once I wrap the template with the aluminum foil and bend it, I expose my parabolic wireless antenna to light and find where the concentrated light is is focused. I mark this as the focal point. See picture for the idea.
This is not the actual picture, but to give you the idea on how I find the focal point. You may need to increase the curve degree so the focal point is within the curve areas.
Since parabolic wireless antenna is the cheapest home made wireless antenna to make, you can try to experiment it with another material, for example using a brass, steel, copper or aluminum plate; but in my observation aluminum foil had done a great job. I will post my very own parabolic wireless antenna soon, right now I only can obtain the gain up to 6dBi and I’m trying to increase the gain as high as possible. Wish me luck! Picture below give me the rough idea on how do I make my parabolic wireless antenna.
Picture credit to [Freeantennas]