Novel Formulation for Generalization of Mixed-mode S-parameters for Coupled Differential High-speed Digital Channels

As the demand for higher data rates intensifies, achieving accurate S-parameter calculation becomes increasingly critical. The conventional single-ended to mixed-mode S-parameter conversion formulation assumes uncoupled structures, which may not be true for high-speed digital channels. This work int...

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Bibliographic Details
Main Authors: Mathew, Manish K., Cai, Kevin, Li, Chaofeng, Mousavi, Mehdi, Ahmed, Shameem, Kim, DongHyun Bill
Format: Conference Proceeding
Language:English
Subjects:
Accuracy
Crosstalk
Insertion loss
loosely coupled
Matrix converters
Microstrip
mixed-mode
multi-pair coupled differential trace
Periodic structures
Scalability
Scattering parameters
Stripline
tightly coupled
transformation matrices
Transmission line matrix methods
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Summary:As the demand for higher data rates intensifies, achieving accurate S-parameter calculation becomes increasingly critical. The conventional single-ended to mixed-mode S-parameter conversion formulation assumes uncoupled structures, which may not be true for high-speed digital channels. This work introduces a novel, generalized formulation for mixed-mode S-parameters and their corresponding transformation matrices [M 1 ] and [M 2 ], enabling comprehensive analysis of multi-pair coupled differential traces. An intra-pair crosstalk analysis of a tightly coupled stripline and microstrip line verifies and highlights the difference between the proposed and old formulations. A loosely coupled case is analyzed as an additional validation of the proposed formulation. Finally, the generalized conversion formulation is used to perform an inter-pair crosstalk analysis which compares the old and the new conversion formulation.
ISSN:2158-1118
DOI:10.1109/EMCSIPI49824.2024.10705546