Characteristics of the composite right/left-handed transmission lines

Author

Sanada, Atsushi ; Caloz, Christophe ; Itoh, Tatsuo

Author_Institution

Electr. Eng. Dept., Univ. of California, Los Angeles, CA, USA

Volume

14

Issue

2

fYear

2004

Firstpage

68

Lastpage

70

Abstract

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 Γ point (β=0) of the Brillouin zone (BZ) degenerate at ω_Γ 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.

Keywords

microstrip lines; nanocomposites; transmission line theory; waveguide theory; Bloch-Floquet theory; Brillouin zone; CRLH microstrip line; bandgap; composite right-left handed transmission lines; dispersion diagram; eigenfrequencies; infinite guided-wavelength propagation; metamaterials; nonzero frequency; nonzero group velocity; Frequency; Helium; Inductance; Metamaterials; Microstrip; Parasitic capacitance; Photonic band gap; Transmission line theory; Transmission lines; Two dimensional displays;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2003.822563

Filename

1268100