How-To Geek

Dirt Cheap Bi-Directional Antenna Wirelessly Extends Your LAN

If you’re looking for an effective way to link remote LANs without the hassle of laying cable, this DIY bi-directional antenna is a quick (and cheap) method for bringing internet access to outbuildings and other locations.

Tinker Danilo Larizza needed to share internet access between apartments that are relatively close together but not hardwired–ruling out simply sharing the access via existing LAN infrastructure. His solution combines a simple scrap wire antenna array mounted inside a plastic food bin (seen here with the cover removed to show the antenna) and some coaxial cable to link the antenna to two routers.

Our favorite part about his build is that he constructed the pair to establish if the antenna setup would even work in his location and intended to buy commercial antennas if it did; his Tupperware models worked so well, however, they’re now the permanent solution. Hit up the link below for more information about the project.

2.4 Ghz Directive Biquad Antenna [via Hack A Day]

Jason Fitzpatrick is a warranty-voiding DIYer who spends his days cracking opening cases and wrestling with code so you don't have to. If it can be modded, optimized, repurposed, or torn apart for fun he's interested (and probably already at the workbench taking it apart). You can follow him on if you'd like.

  • Published 11/28/12

Comments (11)

  1. Kiran

    How this coaxial cable is connected inside? Directly to the router? Antenna needs to be removed or what? What if I have two antennas? Need to remove both?

  2. Osamudiamen jubilee

    Love ur service

  3. Dave

    Even multiples only. Past 62 cm per quad may not work so well. Keep the coax connection point separation distance the same as on the 31 cm model.

  4. Curtis

    Is it just me or, are the Hack instructions in some other language?

  5. Skitch4

    You guys are totally awesome, keep up the excellent work; I look forward to you’re articles to keep my brain from getting rusty and thanks for allowing the older generation the privilege of being taught from the younger!!!

  6. Joel

    This is pure stupidity…Putting a link to a project in another language. Dimwits.

  7. Frank D

    @Curtis: Here is a Google translated version of the Italian instructions:

    We’re talking about antennas …. 2.4 Ghz.

    I was trying to design an ‘omni-directional antenna’ … . The signal is focused in one direction so the gain increases much more.

    Usually it is an outdoor use .. perhaps to connect 2 points that will “see” each other. For my own use. I had to share a network between two apartments not far apart. I was using two omni-directional connections there .. it was fast but very often fell completely.

    Not being able to change the antennas in both locations I’ve dabbled in building this direction “at no cost” by connecting it to one of the two access points.


    * a coat hanger … or sufficient iron wire … or copper wire with rigid core
    * one meter in length
    * a soldering iron and solder

    We need to fold the metal in 2 square with sides 31 mm as shown in the figure below.

    We solder in a corner the hot center of the coaxial cable …. and in the other corner the knitting. (?) (I guess he means connect the woven ground sheathing to the other corner.)

    FINISHED! :)

    We just have to package everything in order to withstand the weather. I enclosed everything in a food container … lightweight and airtight. A couple of plastic cable ties to fix it … and I guarantee it works wonderfully.

    Hope that works.

  8. r

    looks horrible… I’d rather just buy one for 6$ and avoid being laughed at.

  9. phill

    that is cool

  10. William Henry

    Is this a method to increase range or strength? If it meant to share one LAN with others, are they also decreasing bandwidth and security?

  11. jerome

    If possable I would really like to read a translation of this, I would really like to read what he is saying

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