Construction method of compact electromagnetic band gap (EBG) structure for eliminating high speed circuit noise

Abstract

The invention relates to a construction method of a compact electromagnetic band gap (EBG) structure for eliminating high speed circuit noise. Based on a coplanar compact EBG structure, the method has 5 steps: 1. establishing a power supply system of a printed circuit board in electromagnetic simulation software CST according to the general design norms of printed circuit boards; 2. editing a power source plane of a power supply distribution system into a novel plane compact EBG structure by a model builder of the CST software; 3. intercepting a unit of the compact EBG structure in the CST software for carrying out dispersion graph analysis and adjusting the structure of the unit; 4. adding a dispersion port, calculating the transmission S parameter of the power supply system and optimizing the structural dimension in the CST software to obtain required gap indexes; and 5. adopting a two-sided copper-clad plate to manufacture the EBG structure according to the determined optimal dimension in step 4. The method provided by the invention improves planar power supply area of the power source and inhibits the high frequency part and the ultrahigh frequency part of the noise of the power supply system.

Description

(1) Technical field [0001] The invention relates to a construction method of a compact electromagnetic bandgap structure to solve high-speed circuit noise. The method is based on a novel compact electromagnetic bandgap structure, which can suppress the high-speed circuit power distribution system High frequency and ultra high frequency power supply noise. The invention belongs to the field of high-speed circuits. (2) Background technology [0002] With the development of electronic products towards miniaturization and high integration, the structure of the power distribution system of electronic products also changes to support the higher and higher speed of the system. The initial power distribution system is a discrete power feeder, and then develops into a discrete power ground routing, then fills and splits the power ground, and finally develops into the planar power bus structure of today's multi-layer high-speed circuits. The purpose of the high-speed circuit power d...

AI Technical Summary

Problems solved by technology

And the electromagnetic bandgap structure that has been studied seriously divides the power supply or ground plane, which will have a serious impact on the signal integrity of high-speed circuits

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