NDLI: Electromagnetic study of planar pre-fractal structures using the scale changing technique

Content Provider	IEEE Xplore Digital Library
Author	Mili, S. Aguili, T.
Copyright Year	2010
Description	Author affiliation: SYS'COM Laboratory, National Engineering School of Tunis, ENIT, Tunis, Tunisia (Mili, S.; Aguili, T.)
Abstract	In this paper, the scale-changing method is used to compute the surface impedance of pre-fractal structures characterized by the coexistence of metallic patterns at multiple scale levels. The multi-scale nature of these structures is used to split them into sub-structures enclosed by appropriate boundaries. The calculation starts from the elementary substructure: N active modes excite the considered sub-structure in order to compute the corresponding surface impedance matrix useful for the transition from a scale toward another. The choice of active modes is important in order to ensure the coupling between two consecutive scales and to have a correct description of the electromagnetic state within discontinuities. Consequently, the local modal basis is divided into two parts: - Higher-order modes: localized modes essentially useful for the local electromagnetic description within discontinuities. - Lower-order modes or active modes: travelling modes useful for the coupling between sub-structures. When localized modes are used as active, we show that the electromagnetic description within discontinuities is not correct. The surface impedance obtained by the multi-scale method is compared to the surface impedance computed by the MoM method. The error variation with the number of active modes is presented. It converges with an error less than 0.3% when a sufficient Number of active modes are used.
Starting Page	1
Ending Page	5
File Size	228355
Page Count	5
File Format	PDF
ISBN	9781424452880
e-ISBN	9781424459148
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-14
Publisher Place	Lithuania
Access Restriction	Subscribed
Rights Holder	Geozondas Co.
Subject Keyword	Surface impedance Transmission line matrix methods Electromagnetic coupling Iris Fractals Strips Geometry Laboratories Electromagnetic waveguides Surface waves MoM Scale-changing Surface impedance matrix active modes
Content Type	Text
Resource Type	Article

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