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J. Electromagn. Eng. Sci > Volume 15(1); 2015 > Article
Journal of Electromagnetic Engineering and Science 2015;15(1):26-30.
DOI: https://doi.org/10.5515/JKIEES.2015.15.1.26   
A Simple Model for a DGS Microstrip Line with Stepped Impedance Slot-Lines
Duk-Jae Woo1, Taek-Kyung Lee2, Sangwook Nam1
1Department of Electrical Engineering and Computer Science, Seoul National University
2School of Electronics, Telecommunication, and Computer Engineering, Korea Aerospace University
Abstract
In this paper, a simple equivalent circuit model for a defected ground structure (DGS) microstrip line with stepped impedance slot-lines in the ground plane is presented. In addition, an analytic expression for the resonance frequency of the proposed structure is derived. In equivalent circuit modeling, the capacitance and the inductance of the resonance circuit are evaluated from the dimensions of the etched pattern in the ground plane. The resonance frequencies calculated from the proposed method are compared with those obtained with an electromagnetic (EM) simulation.
Key words: DGS, Equivalent Circuit Model, Stepped Impedance Slot-Line

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