IBCrazy's Cloverleaf antenna jig

by kjetilhansen, published

IBCrazy's Cloverleaf antenna jig by kjetilhansen Mar 29, 2012

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This is a jig for soldering up the leafs in the cloverleaf antenna


Check out Rc-explorer's guide on how to make these antennas.

This jig helps you keep it 120 or 90 degrees depending on if you are making a 3 or 4 leaf antenna. The walls are 45 degrees so you can choose if you want to make RHCP or LHCP antennas.

These antennas where invented by IBCrazy from the rcgroups, and are excellent on FPV use for video transmissions.

Follow the guide on rc explorer on how to make the leafs match your frequency, and place the leafs in the jig an solder up.

The guide for the antenna is here:

and the IBCrazy's forum post is here:

Note: This does not work with 900mhz, if you plan to use this with 900mhz you need to add some support on the 45 degree walls for added length.

Download "Main jig for 1,3ghz.stl" for 1,3 and up, and if you want to use less ABS og PLA download "cloverleaf_antenna.stl" for 2.4 and up for less material usage.

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Great design. I like the idea of what you made to use is as a jig. I am not sure if ABS absorbs(read attenuates) RF, but a simple test for that is to stick the ABS you are going to use in the microwave with a cup of water for two minutes. If the ABS comes out any warmer after being nuked, then it will attenuate transmitted signals.

On another note:
Please remove "IBCrazy" from the posting, unless you are honestly trying to attract more people to download/make it.

IBCrazy did NOT invent the cloverleaf antenna.... or come up with the conceptual design. He does NOT have a patent on the Cloverleaf antenna either. Have a visit at the uspto.gov website and type in his name... which you can find on the internet.

The Skew Planar Antenna, or clover leaf as some like to call it, was published in an Amateur Radio periodical QST in 1963.

This is only ment to be used to hold the leafs while solder them, Then you add hot-glue in the center and remove the jig.

I know he did not invent it. He was the one that introduced it to the FPV community.

The title of this thing does not say that he invented the cloverleaf, but rather a jig you use to make the antennas he makes. It is also more easy for users to find this thing when it has a known name.

So this cylinder happens to be the diameter of a 900mhz antenna? But it will not support 900mhz? I am confused as to where I should add the support. Trying to make a 900mhz antenna obviously :)

Hello :)

No this cylinder is smaller than an 900 Mhz antenna, so the support needs to be added on the 45 degrees walls (choose if you want RHCP or LHCP)

I used a very thin metal foil and some hot glue. The inventor part file is also included in the files tab if you want to make the diameter larger :)

Thank you for this design. Do you have any pictures or instructions on how to use the jig? While I understand how to make the cloverleaf antenna, I'm not entirely clear how to best use this jig? for example, what is the cylinder used for and what are the three angled lines used for? Thanks!

Hello :)
Sorry, I don't have any pictures, but I will do my best to explain how to assemble a cloverleaf antenna with this jig.

First, the three angled lines are the angle the antennas feet should be. When you bend the cobber wire you should have 2 straight edges and one curved, where the straights meet, the angle should match the one on the jig.

The cylinder is used to help bend the curved part of the antenna. So the angled lines, and cylinder you use to make the antenna parts (they are just there to help you, no need to actually use them)

After you have made 7 "leafs" it's time to solder them up. Place them in the jig and lean them against the wall you wish (depends if you want a right or left polarized antenna) and use a bead of hot glue to keep them in place, then add the coax cable from underneath the jig and solder up. When all is soldered up, apply hot glue to the solder point so it's more rigid. It's been said that this will make it loose range, but I still highly recommend it since the range loss is not very noticeable..

Hope this helped you :)

Thank you, yes that helps a lot. One thing, you say 7 leafs? I've seen and used a 4 leaf and a 3 leaf but never a 7 leaf antenna. It doesn't even look possible to get 7 leafs on this jig, we're you saying 7 leafs to make two antennas?

Yes. The leafs are the same so you need 7 to make two antennas :)

Coool! What % infill did you use, as my printer says it needs about 18m of material! Mind, that is 100% infill :)

Very useful. No "Main jig.stl" yet though.

Oh, I made a little typo... I should be "cloverleaf_antenna.stl" Sorry about that :)

Awesome indeed.

As a lot of other people (i suppose) I was planning on making something very similar to this. Thank you for beating me to it!

Yeah, this is a very important tool for us fpv people :) Hope it can do the job. If you think it is missing any features it would be great to se another design :) I added a messurment for 105 degrees and the round tool to help make a good curve...

Awesome! Thanks!