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In determining interaction between plasma and electromagnetic wave, plasma frequency and collision frequency are two key para-meters. They are derived from electron density and temperature, which vary in an extremely wide range, depending on a plasma gene-rator. Because the parameters are usually unknown, traditional researches have utilized simplified electron density model and constant electron temperature approximation. Introduction of plasma fluid model to electromagnetics is suggested to utilize relatively precise time dependent variables for given generator. Dielectric barrier discharge(DBD) generator is selected due to its simple geometry which allows us to use one dimensional analysis. Time dependent property is analyzed when microwave is launched toward parallel plate DBD plasma. Afterwards, attenuation tendency with the change of electron density and temperature is demonstrated.Key words: Plasma Fluid Model, Dispersion Relation, DBD Plasma, Atmospheric Pressure Plasma, Microwave Attenuation {O<=_|w}~_<=Lj_ W:G<=%w} [#M3*. <cF(Department of Electric and Electronic Engineering, Yonsei University) *_<=(Agency for Defence Development) Manuscript received April 28, 2014 ; Revised June 17, 2014 ; Accepted July 30, 2014. (ID No. 20140428-040)Corresponding Author: Jong-Gwan Yook (e-mail: jgyook@yonsei.ac.kr)

Time Dependent Interaction between Electromagnetic Wave and Dielectric Barrier Discharge Plasma Using Fluid Model