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An architecture for active metamaterial particles and experimental validation at RF
Author(s) -
Popa BogdanIoan,
Cummer Steven A.
Publication year - 2007
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.22789
Subject(s) - metamaterial , microwave , permittivity , bandwidth (computing) , amplifier , dispersion (optics) , electronic engineering , materials science , engineering , physics , optoelectronics , computer science , optics , telecommunications , dielectric
We describe a class of metamaterial particle that employs active elements to overcome the inherent limitations of their passive counterparts, such as significant losses, high dispersion, and narrow bandwidth. The active unit cell can be designed to have either an electric or magnetic response. For a magnetic active metamaterial, we derive the design equations for the unit cell and validate them experimentally through the extraction of effective permittivity and permeability from S ‐parameter measurements of a unit cell in a waveguide. We show that phase delay in the amplifier can be used to control losses and dispersion. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2574–2577, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22789