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Influence of number of split rings on the leaky radiation of a metamaterial transmission line based on complementary split ring resonators
Author(s) -
Eggermont Stephanie,
Huynen Isabelle
Publication year - 2012
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.26739
Subject(s) - split ring resonator , metamaterial , ground plane , microstrip , microwave , resonator , optics , transmission line , concentric , antenna (radio) , metamaterial antenna , radiation , leaky wave antenna , anechoic chamber , physics , radiation properties , ring (chemistry) , acoustics , radiation pattern , microstrip antenna , electrical engineering , engineering , telecommunications , geometry , slot antenna , mathematics , chemistry , organic chemistry
This article discusses the influence of the number of concentric split rings on the radiation performances of a leaky wave antenna (LWA) created by a microstrip transmission line periodically loaded by series gaps and complementary split ring resonators (CSRRs) in its ground plane.The addition of a second concentric split ring in the CSRR structure strongly modifies the distribution of electric and magnetic currents in each cell of the periodic LWA structure. As a consequence, the far‐field radiation pattern of the cell shows a zero in the broadside direction, which is responsible for an apparent split of the LWA radiation pattern at the upper frequency of the backward scanning range, predicted by full‐wave simulations and validated by measurements in anechoic chamber. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:867–875, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26739