Compact linear lead/lag metamaterial phase shifters for broadband applications

Antoniades, Marco A. and Eleftheriades, George V. (2003) Compact linear lead/lag metamaterial phase shifters for broadband applications. IEEE Antennas and Wireless Propagation Letters, 2 1: 103-106. doi:10.1109/LAWP.2003.815280

Author Antoniades, Marco A.
Eleftheriades, George V.
Title Compact linear lead/lag metamaterial phase shifters for broadband applications
Journal name IEEE Antennas and Wireless Propagation Letters   Check publisher's open access policy
ISSN 1536-1225
Publication date 2003-01-01
Sub-type Article (original research)
DOI 10.1109/LAWP.2003.815280
Volume 2
Issue 1
Start page 103
End page 106
Total pages 4
Place of publication Piscataway, NJ, United States
Publisher IEEE
Language eng
Abstract A compact one-dimensional phase shifter is proposed using alternating sections of negative refractive index (NRI) metamaterials and printed transmission lines (TL). The NRI metamaterial sections consist of lumped element capacitors and inductors, arranged in a dual TL (high-pass) configuration. By adjusting the NRI-medium lumped element values, the phase shift can be tailored to a given specification. Periodic analysis is applied to the structure and design equations are presented for the determination of the lumped element parameters for any arbitrary phase shift. To validate the design, various phase shifters are simulated and tested in coplanar waveguide (CPW) technology. It is demonstrated that small variations in the NRI-medium lumped element values can produce positive, negative or 0/spl deg/ phase shifts while maintaining the same short overall length. Thus, the new phase shifter offers some significant advantages over conventional delay lines: it is more compact in size, it exhibits a linear phase response around the design frequency, it can incur a phase lead or lag which is independent of the length of the structure and it exhibits shorter group delays.
Keyword Broadband
Negative refractive index
Periodic structures
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Information Technology and Electrical Engineering Publications
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Created: Sat, 03 Dec 2011, 02:08:13 EST by Ms Deborah Brian on behalf of School of Information Technol and Elec Engineering