It is unclear to me why you would need to redesign your antennas.
A few different reasons.
The biggest reason is so I can eventually offer production-ready files for both the reader and
the antennas. With that, no one has to rely on commercial products that may or may not be available in the future. That supports one of my original main project goals which is a complete package from soup to nuts and all the info anyone would need to implement it.
A more immediate reason is for testing and tinkering. With this first antenna design, as I mentioned, I made the component packages a little larger so I could easily hand-solder them with the idea of tweaking certain values and observing the result.
Another reason is that I wanted to modify the footprint slightly. The largest Eccel antenna I own (and the largest they make, last time I looked) is 80x80 which isn't wide enough for two cards side-by-side. Yes, the 80x80 antenna will generally still read two cards side-by-side, but reception gets worse as you deviate more from the center of the antenna. I want to see how the larger antenna footprint behaves with relation to RFID playing cards.
Also, if I can design usable antennas, I think they'll be less expensive to produce than what the commercial versions cost. Not a huge
difference or deal, but when you're using 10+ for a table, cheaper is better.
Finally, for fun
For the antenna design, i saw somewhere that it's best to avoid right angles in the corners. No idea if it's critical x)
Yeah, I wish I'd radiused the trace corners a little more. They are slightly
radiused, but I think I should have gone more.
From the little I've read, right angles should generally be avoided with traces but I think it only really
starts to become critical at higher frequencies than what we're dealing with. I hope. We'll see.
Can you put your antenna kicad files on your git? Might save me some hours :-D
I do intend to make everything public on github eventually. I'm not sure I'm quite ready yet but IM me if there's some specific stuff you want. As for the antenna design, I really just tried to follow the PN5180 design guide doc. I'm really not nearly smart enough to reinvent the wheel.