Title :
Experimental Demonstration of Negative-Index Propagation in a Rectangular Waveguide Loaded With Complementary Split-Ring Resonators
Author :
Estep, N.A. ; Askarpour, A.N. ; Alu, A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Texas at Austin, Austin, TX, USA
Abstract :
In a recent paper, we studied a metamaterial consisting of stacked metal plates loaded by embedded complementary split-ring resonators (C-SRRs), ideal to support negative-index propagation and reversed Cherenkov radiation. Here, we experimentally verify negative-index propagation in a related structure, a conventional X-band waveguide loaded with a single column of C-SRRs, emulating a unit cell of an effective bulk negative-index metamaterial. Measurements and supporting simulations reveal a passband between 4.2 and 4.6 GHz, with a phase response typical of negative-index propagation.
Keywords :
metamaterials; rectangular waveguides; resonators; C-SRR; X-band waveguide; effective bulk negative-index metamaterial; embedded complementary split-ring resonators; negative-index propagation; phase response; rectangular waveguide; reversed Cherenkov radiation; unit cell; Dispersion; Load modeling; Loaded waveguides; Metamaterials; Nickel; Probes; Complementary split-ring resonators; metamaterials; negative index; transmission lines; waveguides;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2356558
