I have finished the panel!.
The PCBs got revised a bit and it looks super neat.

IDK what to say more about it. I’ll order and We’ll see.

TLDR; finished the three versions and then realized that palatalization would be cheapest.

SO today I have started on making the 1/4WL stub filter footprint.
It was pretty painfull as this is super illegal in PCB design because we are connecting two diferent nets. So yeah took inpiration from a netie and it didn’t give me much. Well because I missed one little tiny small config that allows connecting specified pads together. Then I fought why it wouldn’t copper fill the needed area after that why it would fill too much, partly and at the end I was able to make it.
Unfortunatly HackClub lapse decided to delete my 2hr suffering neat now I don’t have to look at it.

After that I have inplemented it and this step was pretty simple thanks for the previous experience.

And the last one was pretty easy as I had all the right ingredients to cook it :)

Then I had the briliant idea to panelize it as it would reduce the price per board.
So that’s going to be for nextime. Because I’m fighting with lapse now.
like ALL OF MY 3HR PROGRESS GOT LOST!

Today I have finished the filter PCB. Next I’ll do the 1/4 wavelength short stub.

I know the dimensions of the SMA connector now.

I began researching on impedance matching in KiCAD to have the best reception as we are dealing with super small power levels and we can’t afford to loose any power.
Well I still have no clue on impedance matching but it’s hopefully 50ohm.

Then I began calculating with KiCADs calculator the target impedance on a planar waveguide with a GP. After a bit of fidling I think that I got the right calculation.

So started moving the footprints. And the I have made the 1mm traces as well as the 0.18mm coper fills to match impedance.
The researched on how to do via stitching in KiCAD and found that there is a RF tools plugin.

Added graphics and a description to the silkscreen.

And that’s it. It probably sounds pretty easy but it’s super intensive and RF is magic.

Decided on the filter and the SMA connctor

So I have searched a lot to even find one that is in the right band. LCSC doesn’t have the right data and aliexpress is horible in this. So I have asked a community member that had already made it.
I have settled on a HDF6861 because it’s the chapest and it’s ok.

And for the SMA I went with the one that has pins because it’s more flexible.