WIKI - NFC phone performance

[Pilgrimsmaster]

@pearlheartgtr

Once the cases are on, ]…] I can’t get them to actually read the implant

a couple of options for you to consider

Improve your cellphone's NFC antenna

Probably do this next time I change the back on my s10 (all glass so breaks often)

Resonant Repeater Stickers

I want to create flex PCB stickers that are cheap and you can just slap on stuff to reshape the field to couple better with implants. I did some calculations about “on-board” capacitors that are just copper pours so we can create the stickers without needing to populate parts or add any z-height. My calculations indicate that two 1cm² copper plates on a 0.13mm thick polyimide flex PCB will create a capacitor of 22.5pF C = ε0 * εr * (A/d) 1cm2 on 0.13mm thick polyimide: C = 8.85⋅10−12 * 3.3 *…