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By Sean Goudeloc
Yagi Antenna, originally known as Yagi-Uda Antenna, is the most well-known directional range antenna on the radio amateur bands. Yagi wifi antenna broadens your wifi range into a stunning amount of distance. Given with proper computations and measurements, making this antenna, will be as easy as one, two, three.
Before anything else, you need to assemble all equipment and materials needed for the construction of Yagi Wifi Antenna. These materials are the following: computer with ink jet printer, firm solid metal wire such as big paper clips, popsicle sticks, crazy glue, white glue, soldering iron and lead, scissors, sanding papers, nibbler or pliers, metric caliper or metric ruler with mm, yagi antenna template, and USB wifi (preferably with an antenna extension or a 2.4 GHz device). After gathering all needed materials, you are now ready to build your own Yagi Wifi Antenna, in the comfort of your own home.
First you need to print out the yagi diagram in its original size. This can be googled and downloaded by searching “yagi modeler by W9CF.”Print this out using a landscape orientation for your page setup. You shall see a picture comprised of one long horizontal line, which is the backbone of your antenna, and fifteen vertical lines crossing the horizontal lines. These vertical lines denote the Yagi elements. After printing, you need to verify its scales using the metric ruler or the metric caliper. In the template, you will notice pairs of numbers beside each vertical line. The first number represents the length of the elements while the second number corresponds to the distance of each element from the start of the diagram. If your measurement is the same with that of the template, then you are good to proceed with constructing your own Yagi Wifi Antenna.
Next, place the paper clips over the vertical lines of the template and mark it according to the size of each line. Then, cut the paper clips using a nibbler or pliers. After that, place the measured paper clips onto the respective vertical lines, and fix them in place using crazy glue, except for the line number two. Element two is what you called the driven element, which is the one connected to the electronics.
After affixing the elements, the backbone must now be made. Cut popsicle sticks and paste them onto the gaps in between each element. Do this in a backward manner, starting from elements 15 up to element two. It sorts of like a fish backbone.
The driven element is left out from previous steps because it is different from the other elements. Instead of placing a straight wire onto it, you are going to put a broken loop about the size of a regular big paper clip. Place it in a manner that it loops around and convene at the center but the end not having contact with each other, thereby producing a gap in between. After that, continue making the backbone around elements one and two, then place and glue a full-length popsicle stick or any other wood on top of the whole horizontal line and rip the paper template.
Afterwards, the last yet most difficult step is connecting the antenna to the Yagi Wifi Modem. You should solder or bond a wire between the Wifi board’s RF output and the second element of the Yagi Wifi Antenna. For Wifi modems with external antenna, you just have to substitute the external whip antenna with the Yagi Wifi Antenna. On the otherhand, for Wifi modems with internal antenna, you need to do a little experimenting. There are people who says that you need to attach the center of the coax to the second element and the sheath to the first element. Moreover, the wire in the middle of the second element must be linked to the spot it enters the popsicle stick. Or better yet, hook up a thin string of copper wire between the active element of the strip antenna and the other at one end of the loop of the second element.
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