A novel stopband-enhanced EBG planes using an Embedded Slow-wave Structure in Low-cost RF-SiP

Based on the slow-wave concept, an EBG power planes with stopband enhancement is proposed by using ground surface perturbation lattice (GSPL) between the coplanar EBG power and ground planes. This structure has 73% and 100% stopband enhancement, respectively, compared to the conventional coplanar and mush-room typed EBG planes. A test sample of 16 unit-cells on a 40mm square substrate is fabricated with 4 GHz stopband and is validated both by simulation and experiment. It is a low-cost design in SiP because no high-K material is required. Two test chips, C-band LNA (5.6GHz) and off-chip digital drivers (1.3GHz), is designed and integrated on the EBG substrate. In the chip-package co-simulation, over 40dB suppression for the 1.3GHz harmonics noise on the LNA output is seen for the proposed EBG planes.