Mictronics - DIY Electronic projects and more.

Beer-CanTenna - A antenna for 433MHz

Just in case someone needs a simple and easy to build ground station antenna, usable with any 433MHz TX, here is a solution:

Beer-CanTenna measurement setup.
Return loss at 433MHz.
Inside the can.
On a tripod, extended to ~3m height.

What you need:
1x Beer can, height 170mm, outer diameter 66mm, top opening diameter 52mm
1x Steel welding rod, 500mm length, diameter 1.5mm
1x BNC or SMA panel mount socket with front side nut

How to build:

-Drill a hole in the bottom center to insert the BNC/SMA socket.

I made a extension pipe with a BNC socket on one end and some tripod adapter on the other. This way I can raise the antenna up to 3m on the tripod.

The antenna connects with a 5m BNC cable to the transmitter.

I have tested the antenna during my 11km flight with excellent results.

FPV 11km out over clouds, controlled with EzUHF.

Note, a different size beer can may require a different length of the welding rod.

👈 Home