A Study on the Characteristic of Variable Impedance Line using DGS

DGS를 이용한 가변 임피던스 선로 특성에 관한 연구

  • Published : 2005.01.01

Abstract

In this paper, we designed and fabricated the variable impedance line by using the DGS(Defected Ground Structure) which is useful in mounting the external lumped elements. Also we used a varactor diode as Control device stuff at the proposed variable impedance line. We are able to change the impedance of transmission line as varied the capacitance of varactor diode by adjusting DC bias. The impedance variation of the proposed DGS line is about maximum 70 Ω. We will study about the application of DAM(Direct antenna modulation) in the future work.

Keywords

References

  1. J. S. Park, J. H. Kim, J. H. Lee, S. H. Kim, and S. H. Myung, 'A Novel Equivalent Circuit and Modeling Method for Defected Ground Structure and Its Application to Optimization of a DGS Lowpass Filter', IEEE MTT-s Digest, pp. 417-420, 2002 https://doi.org/10.1109/MWSYM.2002.1011644
  2. D. Ahn, J. S. Park, C. S. Kim, Y. Qian, and T. Itoh, 'A design of the low-pass filter using the novel microstrip defected gound structure,' IEEE Tran, Microwave Theory Tech., vol. 49, no. 1, pp. 86-93, Jan. 2001 https://doi.org/10.1109/22.899965
  3. C. S. Kim, J. S. Lim, S. W. Nam, K. Y. Kang, J. I. Park, G. Y. Kim, and D. Ahn, 'The Equivalent Circuit Modeling of Defected Ground Structure with Spiral Shape', IEEE MTT-s Digest, pp. 2125-2128, 2002 https://doi.org/10.1109/MWSYM.2002.1012290
  4. C. S. Kim, J. S. Lim, S. W. Nam, K. Y. Kang, and D. Ahn, 'Equivalent circuit modeling of spiral defected ground structure for microstrip line', Electronics Letter, vol. 38, no. 19, pp. 1109-1111, 12th Sep. 2002 https://doi.org/10.1049/el:20020742
  5. Hung-Yu David Yang, 'Theory of Microstrip Lines on Artificial Periodic Substrates,' IEEE Trans. on Microwave Theory and Tech., vol. 47, no.5, pp. 629-635, May 1999 https://doi.org/10.1109/22.763165
  6. M. S. Jung, 'A Study on the Novel DGS and its Application to Oscillator Design', Doctoral dissertation, pp. 45-61, 2003