Composite Right/Left-Handed Transmission Lines Based on Conductor-Backed Coplanar Strips

Rei GOTO  Hiroyuki DEGUCHI  Mikio TSUJI  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E89-C   No.9   pp.1306-1311
Publication Date: 2006/09/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e89-c.9.1306
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Metamaterials for Microwave and Millimeter-Wave Applications)
Category: 
Keyword: 
metamaterial,  left-handed medium,  CRLH,  coplanar strips,  leaky-wave antenna,  

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Summary: 
We propose here a composite right/left handed transmission line constructed by using conductor-backed coplanar strips. In this line, we can easily realize a shunt inductor without via because it has the electric-wall symmetry at the guide center. The left-handed nature is verified by both the finite difference time-domain (FDTD) and the equivalent-circuit calculations. Furthermore, we demonstrate the proposed line can easily satisfy the balanced condition for no band gap between the right-handed and the left-handed modes, and can be applied to a leaky-wave antenna, numerically and experimentally.