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A Novel Power/Ground Layer Using Artificial Substrate EBG for Simultaneously Switching Noise Suppression

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3 Author(s)
Ting-Kuang Wang ; Dept. of Electr. of Eng. & Grad. Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei ; Tzu-Wei Han ; Tzong-Lin Wu

A novel power/ground plane for eliminating the power noise in the high-speed digital circuits using an artificial substrate electromagnetic bandgap (AS-EBG) structure is proposed. The AS-EBG is designed by embedding the air rods and high dielectric constant (DK) rods between the coplanar EBG power/ground planes to enhance the stopband bandwidth. A 2-D transmission-line model of the AS-EBG power planes is also developed with experimental verification to explain the mode perturbation and predict the bandgap of the AS-EBG. It is found that over 60% enhancement of bandwidth (from 1.5 to 2.4 GHz) can be achieved for a 3 times 3 AS-EBG power plane compared to the coplanar-EBG power planes by proper design of the high DK rod with DK of 92. Based on SPICE-based modeling, the excellent power/signal integrity performance of the AS-EBG structure is also presented by the chip-package co-simulation in the time domain. It is found over 70% reduction of the simultaneously switching noise can be obtained with good signal eye-diagram improvement.

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:56 ,  Issue: 5 )