DC power-bus design using FDTD modeling with dispersive media and surface mount technology components

Author

Ye, Xiaoning ; Koledintseva, Marina Y. ; Li, Min ; Drewniak, James L.

Author_Institution

Electromagn. Compatibility Lab., Missouri Univ., Rolla, MO, USA

Volume

43

Issue

4

fYear

2001

fDate

11/1/2001 12:00:00 AM

Firstpage

579

Lastpage

587

Abstract

DC power-bus modeling in high-speed digital design using the finite-difference time-domain (FDTD) method is demonstrated herein. The dispersive character of the dielectric layers used in printed circuit board substrates is taken into account in this study. In particular, FR-4 is considered. The complex permittivity of the dielectric is approximated by a Debye model. A wide-band frequency response (100 MHz-5 GHz) is obtained through a single FDTD simulation. Good agreement is achieved between the modeled and measured results for a typical dc power-bus structure with multiple surface mount technology (SMT) decoupling capacitors placed on the printed circuit board (PCB). The FDTD method is then applied to investigate some general approaches of power-bus noise decoupling

Keywords

circuit noise; digital circuits; dispersive media; electromagnetic compatibility; finite difference time-domain analysis; power supply circuits; printed circuit layout; surface mount technology; 100 MHz to 5 GHz; Debye model; FDTD modeling; FR-4; PCB; SMT; complex permittivity; dc power-bus design; dielectric layers; dispersive media; finite-difference time-domain method; high-speed digital design; power-bus noise decoupling; printed circuit board; printed circuit board substrates; surface mount technology components; wide-band frequency response; Circuit simulation; Dielectric substrates; Dispersion; Finite difference methods; Frequency response; Permittivity; Printed circuits; Surface-mount technology; Time domain analysis; Wideband;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/15.974638

Filename

974638