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Foldable antenna booster for DJI Mavic Pro

by Bash-T, published

Foldable antenna booster for DJI Mavic Pro by Bash-T Jan 27, 2017

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Summary

Inspired by the antenna booster from leenanj, I created my own one and added a feature that all Mavic users really love: Having it foldable :-)

So I designed the Booster from scratch and ended up in having two parts, that will be screwed together with some M3x25 Hex screws. The screws screw right into the plastic hinge of the left shield. I used an M3 thread cutter to tap the holes.

The reflector was made out of two sheets of 80x57mm aluminium foil. I put transparent self-adhesive foil over it to protect the thin foil. I glued it to the inner side of the reflector shields with doublesided tape.

It folds well together and would make transport more handy.
Since I didn't tried it out yet how big the distance improvement is, please share your experience in the comments.
Love to see your makes!

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Good day, you know because when I want to print the file I can not? Can this be blocked?

Hi

This is the 1st one I see with both antenna are at the same distance from the reflector.

There is a few mm offset between the left and right antenna, the linking of left and right reflector would made one reflector pointed a bit not parallel with the other reflector, it would not be a problem for short distance, but for a few KM distance, this would be an issue, may I suggest not to link them together or add an offset linkage.

I suggest to add one panel on top with an antenna hole in it, then the antenna can be sit perfectly.

Please forgive my request, I am new to 3d printing and drawing, I still not able to draw these complex things, otherwise, I would draw it myself.

Hi Formosa2011,

to be honest, I didn't notice the slight offset of the antennas until you mentioned it ;)
When I started designing the reflectors I didn't already own a Mavic, so I stick to the design of leenanj where I remixed it from.
However, the small offset of the antennas didn't prevent the reflector from sliding over the antennas quite well. Until today I didn't have made experience with long distance flights by my own, so I cannot tell if the slight misalignment would make a difference. The farest distance I flew with my Mavic was about 1km (without the reflector), and I still had 4 of 5 signal bars shown on my RC. If anyone would do a fieldtest with/without the reflector please share your experience :)

Adding a panel hole to the top would be possible, but requires qite a lot support due to the overhang. Currently I'm a little bit short in time but maybe I find some time the next days to design some variants.

Best regards,
Bash-T

Hi Bash-T

The max distance I flew with my Mavic was about 2km with stock antenna, but it was in a relatively clean radio environment, I would love to have a booster standby to help to have a cleaner video in a dirty environment.

I saw a few reviews of the 2 boosters available in the market, they all got the holes for the antenna wrongly positioned, it may be the reason that they do not get good review.

I suggest you to have a thinner mounting plates on the bottom, and have a separate plate or screw on mounting lug on top to avoid the supports issues.

You may chose to have one side longer then the other a bit so that they can be folded together.

Regards

Formosa

How much signal does it block? Do you have a simulation of the new radiation pattern and expected directional gain?

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