PRINTED CIRCUIT BOARD HAVING ELECTROMAGNETIC BANDGAP STRUCTURE

摘要

A printed circuit board having an electromagnetic bandgap structure is provided to solve a mixed signal problem of an analog circuit and a digital circuit in an electronic device having a radio frequency circuit and a digital circuit on the same substrate. A printed circuit board having an electromagnetic bandgap structure includes an analog circuit, a digital circuit, a first metal layer(210-1), a second metal layer(210-2), a third metal layer(220), a metal plate(232), and a mushroom type structure(230). One of the first and second metal layers is a power layer. The other one of the first and second metal layers is a ground layer. The third metal layer is stacked between the first metal layer and the second metal layer. The metal plate is arranged in a space between circuit patterns of the third metal layer. The mushroom type structure has a via which is connected to the metal plate.