Broadband equivalent circuit extraction methodology with de-embedding of floating ground references

This paper proposes a physics-based broadband equivalent circuits extraction methodology for multi-ports reciprocal passive systems. The proposed methodology bridges equivalent circuit representations (network architecture) with topological aspects (layout geometry). Linking geometry aspects with network equivalent circuits representations renders possible incorporation of EMC/EMI considerations in library- building models. The extraction methodology uses local ground reference concept for the analysis and simulation of distributed grounding strategies. A novel multi-standard de-embedding technique, based on a homographic transformation, appropriate for local ground references is proposed. This de-embedding technique captures the discontinuity and impedance transformation imposed by numerical electromagnetic excitation sources or measurement probes. Correlations with measurements are presented to validate the proposed methodologies.