It's hard (very lossy) to try to couple the B fields when the rings are different sizes.
Re:Apple Cancels AirPower Product
by konschubert on Saturday March 30, 2019 @04:27AM
(#19528445)
But what if they’re all small and all the same size? In a Grid pattern, like streets between city blocks?
From a first principles point of view it seems to me like it might just work.