Journal
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
Volume 14, Issue 2, Pages 68-70Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LMWC.2003.822563
Keywords
composite right/left-handed transmission line; left-handed materials; metamaterials
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The composite right/left-handed (CRLH) transmission line (TL) is presented as a general TL possessing both left-handed (LH) and right-handed (RH) natures. The dispersion diagram of the two-dimensional (2-D) CRLH-TL is obtained analytically based on the Bloch-Floquet theory, and the unique phenomenon of infinite guided-wavelength propagation, with nonzero group velocity at a nonzero frequency, is explained. It is shown analytically that when the CRLH TL is balanced, two eigenfrequencies at the Gamma point (beta = 0) of the Brillouin zone (BZ) degenerate at omega(Gamma) and a seamless transition from the LH to the RH modes without a bandgap can be achieved. In addition, these phenomena are demonstrated experimentally in the case of a CRLH microstrip line.
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