If you like what you see here, consider leaving a tip. This 2.4 GHz biquad yagi is Inspired by dedicated primarily to antenna design and testing. Check out the to create an antenna of your own design.

Thanks to Thingerverse user, there is some excellent test data done in an anechoic chamber. Check out the VSWR, Frequency Responce, and 3D propagation graphs, and a link to the raw test data on his. This antenna design uses solid 14 gauge (~1.7mm) copper wire. The 27mm element is the first parasitic element followed by 28mm, 29mm, 30mm, then the 31.5mm driven element and a 34mm reflector at the rear (these are all outside dimensions). I have added cylinders with a closed end for attaching a solid reflector and/or base station mount.

This 15 element DIY USB Wifi Yagi antenna works better then my Cantenna. Now that it operates perfectly I. This page details the construction of a biquad antenna. The biquad antenna is easy to build, and provides a reliable 11dBi gain, with a fairly wide beamwidth.

I made a reflector out of a piece of thin 56 mm x 110 mm sheet metal with drilled holes for small screws and a larger hole with a rubber grommet to pass the coax cable through. The parasitic elements are spaced 17mm apart with the reflector spaced 19 mm from the driven element. These dimensions are taken directly from Andrew's PCB biquad yagi design. I used a short length of flexible coax cable with an SMA connector to connect the antenna to my USB WiFi adaptor. Have a look at the video that inspired this design here.

Protect Your Outdoors Antenna Two types of damage can affect a working antenna. It can sustain physical impact and the copper wire may bend and break the soldiered point. Huawei g730 flash tool firmware. 1 Oxidation after a month of use Fig. 2 This biquad was housed If exposed to rain the copper will oxidize which may eventually lead to decreased performance. The antenna pictured in Fig. 1 was used outdoors for a month in almost no rain. The antenna on the right was used for the same amount of time in the same location but was enclosed.

The difference is striking [Fig 2]. Both of these types of damage can be easily mitigated with proper antenna housing. You can use ready made electronics enclosures or even low end solutions like Tupperware containers. If you use Tupperware consider sealing it with silicon to prevent rain from getting in. The enclosure can not be made of metal nor can have any metal foil decals on it. You must use a material that does not reflect microwaves. Some materials may cause the signal strength to drop.

You can conduct a simple test of microwave attenuation of your desired enclosure. Lock the antenna into a vise grip or a camera tripod and point it towards a distant access point. Connect the antenna to the computer and start Netstumbler.

Run Netstumbler for several minutes. Then place the antenna housing in front of the biquad and observe the signal change in Netstumbler. If there is no change or change is rather small your box is acceptable as an antenna enclosure. You can find equipment enclosures at electronics stores or mail order them. Has a great selection of various enclosures and I used their products for other projects.