maniana
Member level 4
Hi, I have to wind a coil on a metal rod that is lossy. I measure Q of air coil as 30, and when I insert the rod (6 inch diameter), the Q drops to 2.5 and the inductance changes only slightly from 6uH to 6.7uH. the coil has to be on top of that rod and it is used as a receive coil in wireless power transfer. So I need a good Q.
My question is how to shield the coil from the rod, what materials to use to improve the Q factor ?
I can't change the material for a rod, it has to be what it is, but I can put anything on top of it (it has to be chip and easy to make).
My question is how to shield the coil from the rod, what materials to use to improve the Q factor ?
I can't change the material for a rod, it has to be what it is, but I can put anything on top of it (it has to be chip and easy to make).