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Aim of this paper is to describe the simultaneous switching noise (SSN) mitigation by means of a novel electromagnetic band gap (EBG) structure with triangle patches and hexagonal array. The proposed EBG structure allows achieving -40 dB stop band within the frequency range 6.5-9 GHz. Parametric analysis including the radius effect of the metal plated vias, the via length and the distance between the patches is performed by means of full wave simulations, based on the Finite Integration Technique. The impact of the proposed design on the signal integrity is also investigated both in time domain (eye-diagrams and TDR) and frequency domain (S-parameters). Finally dispersion diagrams of the singular unit EBG cell are analyzed by means of eigenmode solver and periodic boundary conditions.