Title :
Backward Coupling of Modes in a Left-Handed Metamaterial Tapered Waveguide
Author :
He, Jinlong ; He, Yingran ; Hong, Zhi
Author_Institution :
Centre for THz Res., China Jiliang Univ., Hangzhou, China
fDate :
7/1/2010 12:00:00 AM
Abstract :
The wave propagation in an adiabatic tapered waveguide with left-handed metamaterial (LHM) core and air cladding is investigated by mode-matching method. The results show that the forward guided modes will always couple to the backward modes at the ´critical´ thickness in the lossless waveguide. So, the propagating wave will not be completely standstill at the ´critical´ thickness as proposed in previous reports, but be ´bounced´ back. Besides, the propagation of wave in a lossy LHM tapered waveguide is also investigated.
Keywords :
metamaterials; wave propagation; waveguides; adiabatic tapered waveguide; air cladding; backward coupling; bounced back; critical thickness; left-handed metamaterial core; left-handed metamaterial tapered waveguide; lossless waveguide; mode matching method; propagating wave; wave propagation; Left-handed metamaterial (LHM); slow wave; waveguide;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2010.2049429
