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My colleague managed to find a non-working sensor from Manticore and disassemble it. The interesting points turned out to be: the coils TX and RH are wound with a litzendrate. The winding is done on a plastic frame. The graphite screen is applied only to the frame. Thus, there is a gap in the shielding layer at the point through which the litzendrate is wound onto the frame. I'm wondering how important it is to ensure that the entire coil is in a graphite screen? From the experience of manticore, it can be seen that the gap in the screen is acceptable and is due to the very design of the coil and the use of frames.
Earlier, when I was making coils, I shielded the body from the inside and after pouring the final layer of epoxy, I applied a thin layer of graphite screen. Thus, the coils TX and RХ were located in a completely closed screen. And in the manitcore, it turns out that some part of the coil is not shielded.
I want to try to do a similar experiment: make a winding on the frames and put them in the case. So far, I've modeled this option.
It's a pity, I found out later that the coils must intersect at an angle of 90 degrees. But for a test sample, I think this design is suitable. Jumpers are used in the coil frames for rigidity, after winding the coils and impregnating with epoxy resin and hardening, these jumpers will be removed.
As a result: do I need an absolute coil shielding? there should be a gap between the coil and the graphite shield, does the winding frame just provide a gap from the coil to the aeran on 3 sides? You can try applying a medical adhesive tape to the open part of the coil, and then apply a shielding layer on it. Thus, the entire coil will be in the screen, but on the adhesive tape side (on the 4th side), the gap between the coil and the screen will be minimal: about 0.5-1 mm.
Earlier, when I was making coils, I shielded the body from the inside and after pouring the final layer of epoxy, I applied a thin layer of graphite screen. Thus, the coils TX and RХ were located in a completely closed screen. And in the manitcore, it turns out that some part of the coil is not shielded.
I want to try to do a similar experiment: make a winding on the frames and put them in the case. So far, I've modeled this option.
It's a pity, I found out later that the coils must intersect at an angle of 90 degrees. But for a test sample, I think this design is suitable. Jumpers are used in the coil frames for rigidity, after winding the coils and impregnating with epoxy resin and hardening, these jumpers will be removed.
As a result: do I need an absolute coil shielding? there should be a gap between the coil and the graphite shield, does the winding frame just provide a gap from the coil to the aeran on 3 sides? You can try applying a medical adhesive tape to the open part of the coil, and then apply a shielding layer on it. Thus, the entire coil will be in the screen, but on the adhesive tape side (on the 4th side), the gap between the coil and the screen will be minimal: about 0.5-1 mm.
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