Patent ID: 7438560
Filing Date: 2008-10-21
Classification: H05K

Abstract:
1. A printed wiring board, comprising: a signal plane having a baseband block for processing a baseband signal and a high-frequency block for processing a high-frequency signal which is obtained by converting the baseband signal; and a ground plane opposing to the signal plane, wherein the baseband block and the high-frequency block are connected through a transmission line for transmitting a signal of a specific frequency region; wherein the ground plane is provided with a first ground portion and a second ground portion, the first ground portion being provided at an area opposing to the baseband block, the second ground portion being provided at an area opposing to the high-frequency block; and wherein the first ground portion and the second ground portion are coupled to each other through a coupling portion provided therebetween which has a low impedance with respect to the signal of the specific frequency region.