That most definitely would not work. You need the inductor loop of the large tag to be complete in order for the boosting to happen. Otherwise the large tag is just a spaghetti pile of copper in the way of the field. Check out this video to see the difference between a cut and uncut inductor.
You could remove the chip and replace it with an equivalent capacitor.
It does make sense that this would happen. There’s just never been a reason for us to mate these two antennas shapes before this. Here’s an image of the field shape being created as the large tag interacts with the reader
See how it pulls the field through the center and then around the wires on the top so that they’re now traveling horizontally instead of vertically? If you rest an x-series implant there then the field lines would be traveling right through the center of its small coil.
Remember Amal’s wise words that magnetic fields are kind of like soap bubbles. It’s kind of like the large tag is better at pulling on the bubble created by the reader, because it’s large and doesn’t break the surface tension. Then as the large tag pulls the bubble larger, it’s easier for the x-series tag to rest on the surface and piggyback off of the larger one.
I know. The coil acts as a kind of transformer’s primary. It’s just… sometimes, stuff works. Like I said, if the boosting occured with an incomplete loop for some odd reason, then it’d open the possibility of making an easily implantable booster device that doesn’t require extensive skin slicing to install.
Years agon, (agon was a mistype, but I like it, so i’m keeping it) I had a book, really more of a a pamphlet, that showed how to make an electromagnet for picking up aluminum. This was just at the begining of my being electro-curious, so I didn’t retain specifics.
The idea is that a magnetic field would induce an electric current in the aluminum, which would creat it’s own magnetic field that would oppose the original field. This is how rail guns work.
The trick was using alternating copper/steel layers in the electromagnetic core to somehow twist the field back against itself causing it to attract instead. Kind of a “suck it in” rail gun effect.
With this in mind, and understanding this is likely to be a mental nightmare to design, could a dummy coil be designed to concentrate the lines of flux to a specific location? If you could squeeze the magnetic field to a specific point, and aim it at an implant, then exceptional range, correct?
the chip is so beautiful <3
I’m running already out of space 
Seems like the glue exists. And that I can probably leave 1 sticker on for a whole trip to vegas or whatever.
EDIT: Just found some skin stickers, now I gotta find out how to print an antenna onto this…
EDIT 2: Here’s an ad for a company that prints custom NFC antennas.
Continuing this here.
You could literally just stick an inlay on your hand and put a tegaderm or film patch over it to hold it in place.
Are we basically talking of using using the bullet tag as a “patch antenna” or am I getting my terminology mixed up / is a patch antenna something different.
You’d need to disable the inlay’s own chip first if you just want its antenna to boost something underneath it.
Also, not much of an implant…
I’d call it a coupling extension since a patch is specifically two coils connected by a bridge.
He mentioned in the video you would just replace the chip with a capacitor of the same capacitance as the chip.
Ah okay, I must’ve missed that. My bad…
Okay, I managed to overcome laziness and drag my ass to the lab, and I made a booster coil of my own. Here it is, superglued to my hand:
It’s 8 turns and 22 mm in diameter. It had a 60 pF cap, but I removed it because it made things worse for some reason The red line indicates where my M1k implant is.
I find it extremely position-sensitive: where it sits now, it roughly doubles the range of the M1k. But if I move it just a few millimeters, it does nothing at all. Worse: in certain positions - particularly with the wire crossing the chip perpendicularly the way Amal seems to get the best results, it plain kills the signal. Nothing will read it. It seems to work best with that elongated shape and the chip in the center about 45 degrees.
Strange. At any rate, my finding is that it’s not an easy placement to get any sort of results…
I soldered the cap back on. I think maybe I messed it up earlier because I couldn’t be bothered to drag the magnifier lamp out of the cupboard.
So, with the cap, the best result seems to be with the coil even more elongated, and crossing the chip perpendicularly twice:
This is not terribly practical if I’m honest 
Maybe putting it on the reader semi permanently would be helpful without being quite so impractical
The issue is that you are not cutting across the actual coil of the xM1… check the video again… with the cylindrical antennas you need to cut across perpendicular to them… in the center they dead out… so more like this…
Like I said, in that configuration (without the cap), if I place it there, the chip becomes unreadable. Don’t ask me why, it makes no sense.
Also, it’s not an xM1. I don’t think it makes much difference, but just sayin’
Playing with ferrite…
This moon crescent-shaped piece of soft ferrite capping the implant (in red) is what I found to yield the best results. It extends the range a bit (maybe half as far again as the naked implant), but mostly makes it much less finicky to find the sweet spot:
The performance boost is nothing to write home about though.
Mostly what’s to take home with ferrite is, if it’s over the implant, it totally shields it and the implant is unreadable.
Haha well it’s because the shape of the flux lines that the flat coil is “boosting” or rather reshaping is rotated 90 degrees along the x axis from the flux lines that the cylindrical antenna coil windings would achieve the most saturation. By cutting across it perpendicularly, you expose enough of the cylindrical coil’s inductive “surface area” to achieve a minimum necessary voltage… though it’s still not ideal, which is why you see the xLED only kinda sorta half light up.
Because I lack any 3D visualization tools, some resources…
First, flux…
But this describes flux of a permanent magnet not EM fields created by electron flow through a wire, which are rotated by 90 degrees…
And now you want to induce current into another wire…
But of course, these examples and just about every other example you’ll find talks about straight wire, not a coil of wires, and definitely not a coil of wires wrapped around a ferrite rod… but just consider the mind bending necessary here. The “booster” coil (in my example) is a spiral coil that has a number of turns which are laid out along a flat plane of expanding diameter… so that is flux resulting in current carrying wire where the current is all moving in the same direction…
The cylindrical coil in the implant is a spiral also, but not one that spirals along the x plane with diameter expanding with each turn… it retains the same diameter and spirals along the z plane… and to complicate things it has a ferrite rod core which further manipulates the shape of magnet fields passing though and around it.
In short, it’s complicated.
So we’re messing with Ley Lines now huh.
