I am designing a board using a printed coil matrix inspired by the TIDA-01102. I am now looking into how to design the ground planes for the board.
Looking at the TIDA-01102 design, I am struggling to understand why there are cutouts in the copper pours between the coils. Furthermore, why are there cutouts for all the coils in the first and last columns and only two-and-two in the middle columns? From what I know, I would think it would be better without these cutouts. It would be great if someone could explain the reasoning for these, so I may eventually incorporate this in my design.