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IBCrazy's Cloverleaf antenna jig

by kjetilhansen, published

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

Description

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

Recent Comments

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

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Instructions

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: http://rcexplorer.se/page14/CPantennas/CL/CL.html

and the IBCrazy's forum post is here: http://www.rcgroups.com/forums/showthread.php?t=1388264

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. Enjoy

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 :)
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!
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