ABSTRACT
Power distribution network (PDN) is employed to supply power for circuits. It is an important and essential part for circuit integration at all levels: printed circuit boards (PCBs), packages, and even chips. To reduce the high-frequency impedance of the PDN and provide shielding between different substrate layers, power–ground planes (PGPs) or power–ground grids (PGGs) are widely used as a typical structure of PDN in multilayer PCBs, packages, and chips. This chapter gives a review of the state of the art of the mode analysis method for PGPs and PGGs. It discusses the derivation of the modal fields/eigenfunctions of PGPs from a 2D wave equation, where different boundary conditions. It should be noted that the mode analysis method discussed in this chapter can also be extended to applications of microstrip/strip patch-based radio frequency (RF) structure and component design. In most practical PCBs designs, lots of shorting vias are placed along the contour of PGPs to eliminate the unwanted radiation from them.
