It is a centre-fed broadside array antenna, based on the Franklin Antenna
It has high gain but a very narrow focus beam
You will often find these antennas on mobile phone masts in an array setup of 6 or more.

¼ wave 12.93mm
½ wave 25.86mm
Back Reflector 35mm by 240mm

<p>Enjoyed watching! Thank you.</p>
I'm not sure what wire gauges you are using, according to the video the thinner stuff is 10 and the thicker stuff 18. From the looks of it the thicker stuff is 12-14awg (50metric) and the thinner stuff about 18awg (24 metric), but it's hard to tell from a video.
in the video
Where are the instructions?

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More by andrew mcneil:Double Crosshair Waveguide Antenna for 2 4GHz The Circular Polarized Crosshair Antenna 2,4GHz Combining a Cheap Antenna and Nano Router 
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