Tunable negative refractive index metamaterial phase shifter
| Autor: | Vincent G. Harris, Peng He, Carmine Vittoria, Patanjali V. Parimi, Yongxue He |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Permittivity
Materials science business.industry Composite number Yttrium iron garnet chemistry.chemical_element Metamaterial Ferromagnetic resonance Copper chemistry.chemical_compound Quality (physics) Optics chemistry Insertion loss Ferrite (magnet) Electrical and Electronic Engineering business Phase shift module Refractive index Metamaterial antenna |
| Zdroj: | 2007 IEEE Antennas and Propagation Society International Symposium. |
| DOI: | 10.1109/aps.2007.4395847 |
| Popis: | A novel waveguiding ferrite phase shifter utilizing negative refractive index metamaterial is demonstrated, which is the first device application of negative refractive index metamaterial of its kind. The negative index metamaterial is positioned at middle of the waveguide along the longitude direction, which is composed by a periodic copper wire pattern sandwiched by two pieces of high quality yttrium iron garnet (YIG) films. At the high frequency side of the ferrimagnetic resonance (FMR), the YIG films provide the negative permeability while the copper wires provide the concomitant negative permittivity. The wave strongly interacts with the biased ferrite and the copper wires resulting in a large phase shift over a short distance. A phase shift tuning of 160deg/kOe is achieved at 24 GHz. The insertion loss varies from 4.4 dB to 6.3 dB for the 12 mm long sample. |
| Databáze: | OpenAIRE |
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