DOI QR코드

DOI QR Code

An Equivalent Circuit Model for a Dumbbell-Shaped DGS Microstrip Line

  • Woo, Duk-Jae (Department of Electrical Engineering and Computer Science, Seoul National University) ;
  • Lee, Taek-Kyung (School of Electronics, Telecommunication, and Computer Engineering, Korea Aerospace University)
  • Received : 2014.09.30
  • Accepted : 2014.12.08
  • Published : 2014.12.30

Abstract

This paper presents an equivalent circuit model for a dumbbell-shaped defected ground structure (DGS) in a microstrip line. The effects of equivalent circuit elements of a dumbbell-shaped DGS and their magnetic coupling to the host transmission line are modeled as a simple lumped-element circuit. In addition, simple approximate expressions to determine the main circuit parameters for this model are presented. The transfer characteristic calculated by the proposed circuit model is compared with the results of EM simulation and measurement.

Keywords

References

  1. I. S. Chang and B. S. Lee, "Design of defected ground structures for harmonics control for active microstrip antenna," in Proceedings of IEEE Antennas Propagation Society International Symposium, San Antonio, TX, 2002, pp. 852-855.
  2. J. S. Lim, C. S Kim, D. Ahn, Y. C. Jeong, and S. W. Nam, "Design of low-pass filters using defected ground structure," IEEE Transactions on Microwave Theory and Techniques, vol. 53, no. 8, pp. 2539-2545, Aug. 2005. https://doi.org/10.1109/TMTT.2005.852765
  3. F. W. Grover, Inductance Calculations: Working Formulas and Table. Mineola, NY: Dover Publications, 2004.
  4. O. Sydoruk, E. Tatartschuk, E. Shamonina, and L. Solymar, "Analytical formulation for the resonant frequency of split rings," Journal of Applied Physics, vol. 105, no. 1, article no. 014903, 2009.
  5. W. Froncisz and J. S. Hyde, "The loop-gap resonator: a new microwave lumped circuit ESR sample structure," Journal of Magnetic Resonance, vol. 47, no. 3, pp. 515-521, 1982.
  6. N. C. Karmakar, S. M. Roy, and I. Balbin, "Quasistatic modeling of defected ground structure," IEEE Transactions on Microwave Theory and Techniques, vol. 54, no. 5, pp. 2160-2168, May 2006. https://doi.org/10.1109/TMTT.2006.873633

Cited by

  1. A simple method for improving the stopband response for unequal-length microstrip coupled-line filters with stubs vol.58, pp.10, 2016, https://doi.org/10.1002/mop.30080