2000 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

IEEE Transactions on Microwave Theory and Techniques
Volume 48 Number 10, October 2000

Table of Contents for this issue

Complete paper in PDF format

A Substrate-Dependent CAD Model for Ceramic Multilayer Capacitors

Balaji Lakshminarayanan, Horace C. Gordon Jr., Member, IEEE and Thomas M. Weller Member, IEEE

Page 1687.

Abstract:

In this paper, a substrate-dependent lumped-element model for ceramic multilayer capacitors is presented. The height and dielectric constant of a substrate have a significant impact on the frequency response of a chip capacitor, and these effects cannot be treated independently from the capacitor model. Rather, the equivalent-circuit parameters in the model must be made to vary in accordance with changes in the substrate. The model presented in this paper is suitable for microstrip-mounted components, and has been applied up to 10 GHz for values from 0.5 pF to 0.47 µF,and for FR-4 substrates ranging in height from 5 to 62 mil. The modeling and extraction procedure is demonstrated for 0805-and 1206-style capacitors.

References

  1. S. Yukio, et al. "High-frequency measurements of multilayer ceramic capacitors", IEEE Trans. Microwave Theory Tech., vol. 19, pp.  7-13, Feb.  1996.
  2. A. T. Murphy and F. J. Young, "High frequency performance of capacitors", in Proc. IEEE Electron. Comp. Conf., 1991, pp.  335-344. 
  3. N. Coda and J. Selvaggi, "Design considerations for high-frequency ceramic chip capacitors", IEEE Trans. Parts, Hybrids, Packag., vol. PHP-12, pp.  206-212, Sept.  1976.
  4. R. A. Pucel, "Design considerations for monolithic microwave circuits", IEEE Trans. Microwave Theory Tech., vol. MTT-29, pp.  513-534, June  1981.
  5. L. C. N. de Vreede, et al. "A high-frequency model based on the physical structure of the ceramic multilayer capacitors", IEEE Trans. Microwave Theory Tech., vol. 40, pp.  1584-1587, July  1992 .
  6. V. K. Sadhir, et al. "CAD compatible accurate models of microwave lumped elements for MMIC applications", Int. J. Microwave Millimeter-Wave Computer-Aided Eng., vol. 4, pp.  148-162, Apr.  1994.
  7. J. P. Maher, et al. "High-frequency measurements of Q -factors of ceramic chip capacitors", IEEE Trans. Comp., Hybrids, Manufact. Technol., vol. CHMT-1, pp.  257 -264, Sept.  1978.
  8. E. Benabe, et al. "Automated characterization of ceramic multi-layer capacitors", in 52nd ARFTG Conf., Dec. 1998, pp.  88-94. 
  9. A. Gopinath and P. Silvester, "Calculation of inductance of finite-length strips and its variation with frequency", IEEE Trans. Microwave Theory Tech., vol. MTT-21, pp.  380-386, June  1973.
  10. I. Bahl and P. Bhartia, Microwave Solid State Circuit Design, New York: Wiley, 1990.
  11. K. C. Gupta, R. Garg and R. Chadha, Computer-Aided Design of Microwave Circuits, Norwood, MA: Artech House, 1981.
  12. D. M. Pozar, Microwave Engineering, Reading, MA: Addison-Wesley, 1993.