EM-based design optimization of microstrip lines traversing a rectangular gap in the reference plane
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Fecha
2012-09
Autores
Rayas-Sánchez, José E.
Estrada-Arámbula, E.
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Título del volumen
Editor
Int. Conf. on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD)
Resumen
Descripción
A practical EM-based design optimization method
to mitigate the negative effects of non ideal return paths for
microstrip lines is proposed. Our technique consists of finding
the optimal compensation width of the microstrip line above a
rectangular gap in the reference plane. By introducing this
compensation, distributed effective capacitance above the
discontinuity in the reference plane is increased, such that the
original inductive effect created by the non-ideal return path is
compensated. Highly accurate full-wave EM simulations are used
directly to find the optimal compensation width. Resultant Sparameters
show a very significant improvement of the
interconnect performance at the optimal design, in terms of both
transmission and reflections. It is demonstrated that the optimal
value of the compensation width is far from that one predicted by
first-order quasi-static approximations. Current density
distributions on the non-ideal return path are shown before and
after compensating the microstrip line, confirming the
effectiveness of the proposed technique.
Palabras clave
Non-ideal Return Path, Slit in Reference Plane, Ground-plane Gaps, High-speed Interconnects, Signal Integrity
Citación
J. E. Rayas-Sánchez and E. Estrada-Arámbula, “EM-based design optimization of microstrip lines traversing a rectangular gap in the reference plane,” in Int. Conf. on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD), Seville, Spain, Sep. 2012, pp. 197-200. (P-ISBN: 978-1-4673-0685-0; DOI: 10.1109/SMACD.2012.6339451)