directional double BiQuad WiFi antenna 2.4GHz

by ChatToBrian, published

directional double BiQuad WiFi antenna 2.4GHz by ChatToBrian Aug 25, 2016


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If you, like me, have a garage or other place where WiFi reception is poor because you are to far away from your acces point or modem, then this directional BiQuad WiFi antenna might come handy. With this antenna you can increase the working distance of your WiFi by up to many hundreds of meters.

All you need are:
Copper electrical wire (1.5mm squared, or 1.33 diameter in millimeters)
An antenna base connector (I used a BNC here, but "N" is better)
Some metal reflector where you can solder on
My 3D printed mold.

The costs of this project are only a few dollars or Euro's.

Look at the video for the build of this antenna:

Print Settings


Da Vinci Pro










How you make it

Start by straighten the copper wire and make a 90 degrees angle. Now bend the wire in the mold using pliers and make sure the wire never touches itself by insulating the pieces where it touches.

Watch the video to see how to bend the wire in the printed mold. You can leave the wire in because you use the mold to keep the antenna on the right distance.

Use a metal (copper or tin) plate of about 25x18cm in size. In the middle of the plate you drill a hole of the size of the connector you are using. Place the connector in this hole and tighten it.

Now place the antenna on the connector and solder the 2 wires coming from it to the ground of the connector and the metal plate. Solder the live end to the part of the antenna I point out in the video.

Now you got yourself a perfect WiFi antenna to be used on a WiFi card or USB WiFi dongle with a antenna connector.

How I Designed This

123D Design

The antenna is draw in 123Ddesign to make sure I have all the correct measurements and because the cable is inserted in the printed mold, you can not make a mistake with the length of the copper wire.

The frequency where the antenna is 1:1 is at channel 6 of the WiFi spectrum.

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I'm planning on printing this to use in my workshop where my 3D printer is. I am a little confused on how to get it to hook into my router (WRT54G). Does anyone have a link to a proper connector that does not need a $150 crimp tool? I'd like to just solder it onto the wire in this holder. Thanks!

Hmm does gain will be better if proper bend wire will be in air not in 3dprinted mould ?

I doubt if the plastic does influence the signal that much.
That said, you can use the mold to make a perfect bend antenna and take it out of the mold when your done.

I plan on making one but what ga is 1.5mm wire 12ga or 14ga ?

15-16 ga
I remixed this design...put a 2mm grove which is pretty much on with 12ga

directional double BiQuad WiFi antenna 2.4GHz 2mm

I did some checking an it looks like 16ga would be closest to what we have.
I did make one just need to get the rest of the parts.

Yeah, I did some checking also and somewhere between 16ga and 17ga it would be.
I think I will never get used to the imperial system :-)

Good luck with your antenna. For me it's a big improvement. I had no reception in my garage and now I don't have any packet loss anymore, even at 150mb/sec.

This is 1.5mm squared, or 1.33 diameter in millimeters.
My guess is that this is about 17ga but I am not that deep into the Imperial system to know that for sure.

Hi Brian, Love your design, makes Double Biquad really easy to do,
however i was wondering if there's a fast way to modify the design in order to fit 2mm copper wire...can't find any 1.5 mm solid wire here in my town :(
I was thinking about over-scaling the item a bit in the slicer but i realized that than the radiating element would be off-center in terms of resonant frequency!

Any advices? =)