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A Compact 3-Layer EBG Structure with Square Ring Stripline  

An Sung-Nam (School of Electrical and Computer Engineering, Ajou University)
Shin Dong-Gu (Department of Radio Communications Engineering, Korea University)
Kim Sang-ln (School of Electrical and Computer Engineering, Ajou University)
Choo Ho-Sung (School of Electronic and Electrical Engineering, Hongik University)
Kim Moon-Il (Department of Radio Communications Engineering, Korea University)
Park Ikmo (School of Electrical and Computer Engineering, Ajou University)
Lim H. (School of Electrical and Computer Engineering, Ajou University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.16, no.3, 2005 , pp. 300-310 More about this Journal
Abstract
In this paper we propose the compact three-layer EBG structure. The unit cell of the proposed EBG structure is composed of a square patch in the upper layer and a square ring stripline in the lower layer that are connected to the ground plane through conducting vias. Reflection phase analysis method and tangential transmission method were considered to accomplish effective EM simulation and measurement. EM simulation results indicate that bandgap characteristics of the EBG structure using both methods is nearly identical. Parametric studies have been performed with the EM simulator to analyze the properties of the EBG structure by investigating the phase shift of the normally incident plane wave, and the transmission measurements between simple monopole antennas positioned near the EBGstructure have been done. The operating fiefuency bandgap of the proposed EBG structure is about 34 $\%$ lower than the conventional EBG structure with the same size. Measured results show bandgap from 0.930 GHz to 0.945 GHz.
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