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has been cited by the following article:

• TITLE: An Improved Parameters Extraction Method for Dumbbell-Shaped Defected Ground Structure

  AUTHORS: Yuchun Guo, Qing Wang

  KEYWORDS: Defected Ground Structure, Equivalent Circuit, Parameters Extraction Method, Dumbbell-Shaped DGS

  JOURNAL NAME: Engineering, Vol.2 No.3, April 13, 2010

  ABSTRACT: The paper presents an improved equivalent circuit parameters extraction method for the dumbbell-shaped defected ground structure (DGS). The new extraction parameters equations are obtained in closed-form expressions, which contain S11 and S21. The DGS unit with center frequency of 5 GHz is designed and fabricated on a TLX substrate with thickness of 1 mm and dielectric constant of 2.55. The circuit simulated results are in good agreement with the measured results. This parameters extraction method can be widely used for the design and analysis of DGS .