BurgHammer

0.25 is disc thickness, 10 is SMA connector's distance from the radiator's edge, both in millimeters.

The diameters of the reflector, radiator and first director are 90, 68 and 54 mm, respectively, with 5.75mm and 9mm gaps in between.

Strip width = (L1-L2)/2 = 31mm

It's just a N-connector feeder probe in a 75mm PVC pipe, with a disc-rod director array.

I see no reflector or ground in that drawing, I call shenanigans.

Measurements are in the first post.

Darn.

Oh well, guess I'll have to make a trip to the hardware store after all...

How critical is the reflector thickness? 0.5mm zinc-plated steel is easy to get where I live, thicker is pretty much mail order only.

Newbie question:

Would mesh work for the ground/reflector here?

I'm looking to make a pair of these for testing (and practice) but am a little short on sheet metal at the moment.

"5,5" = 5.5, comma is used for decimal points in some languages.

17 hours ago, Khubaib said:

It is regular copper cable normally used for speakers.

When McNeil mocks cheap, low quality coax as "speaker wire," he doesn't mean you should use literal speaker cable to connect your antenna. :I

I know he's done a video on the Kreosan "WiFi Gun" and another testing it inside a wave guide, and he definitely used normal coax on those, connected the normal way.

20 hours ago, Vasuki said:

What is that number represents after coma , 

For eg- in the first disc from right its  "37,8"

Comma is used for decimal point in some countries (including mine).

"37,8" = "37.8"