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2010-07-21
A New Calculation Method for the Characteristic Impedance of Transmission Lines with Modified Ground Structures OR Perturbation
By
Progress In Electromagnetics Research, Vol. 106, 147-162, 2010
Abstract
In this paper, a new calculating method for the characteristic impedance (Zc) of transmission lines with perturbation and periodic modified ground structure (MGS), such as defected ground structure (DGS), photonic bandgap (PBG), and substrate integrated artificial dielectric (SIAD), is discussed. The proposed method is based on simple transmission line theories and proper related equations. The previous method to find Zc of transmission lines with MGS or perturbation produces the fluctuating Zc value depending on frequency, while the proposed method results in a constant value without frequency-dependence. As examples, several microstrip lines with DGS, PBG, and SIAD structure are simulated and measured, and their Zc values are calculated from S-parameters by the previous and proposed methods. It is shown that the Zc obtained by the proposed method is much more reliable than that calculated by the previous method for all examples.
Citation
Jongsik Lim Jun Lee Jaehoon Lee Sang-Min Han Dal Ahn Yongchae Jeong , "A New Calculation Method for the Characteristic Impedance of Transmission Lines with Modified Ground Structures OR Perturbation," Progress In Electromagnetics Research, Vol. 106, 147-162, 2010.
doi:10.2528/PIER10052602
http://www.jpier.org/PIER/pier.php?paper=10052602
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