Metamaterial transmission lines with extreme impedance values

✍ Scribed by Marta Gil; Ignacio Gil; Jordi Bonache; Joan García-García; Ferran Martín

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 393 KB
• Volume: 48
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.22013

✦ Synopsis

Abstract

In this work, it is demonstrated that it is possible to synthesize the metamaterial transmission lines with extreme characteristic impedances. The structures consist on left‐handed microstrip lines based on the combination of complementary split rings resonators (CSRRs), which are etched in the ground plane, and series capacitive gaps. By means of an adequate design, it is possible to tailor the characteristic impedance of the lines over a wide margin. The realizable impedance values are not easily achievable through conventional transmission lines implemented in commercial microwave substrates. Several illustrative examples are provided and the limitations of the technique (relative to the maximum and minimum achievable impedances) are discussed. The compact dimensions of these artificial lines, related to the small electrical size of CSRRs, are also pointed out. These structures can be applied to the design of microwave components with severe requirements concerning characteristic impedance. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 2499–2506, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22013