Gigahertz frequency tunable noise suppressor using nickel nanorod arrays and Permalloy films
| Autor: | R. E. Camley, Alka V. Kuanr, Sanjay R. Mishra, Bijoy K. Kuanr, Ryan L. Marson, Zbigniew Celinski |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 105:07A520 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.3072824 |
| Popis: | To suppress noise in electronic devices at gigahertz frequencies, the signal attenuation in the pass-band frequency region must be minimized to enhance the signal integrity without distortion. We designed, fabricated, and evaluated two noise suppression microstructures, one using nickel nanorod arrays in a porous anodic aluminum oxide dielectric and a second structure based on a Ni80Fe20 (Permalloy) film in a microstrip waveguide geometry. Both noise suppression structures function as tunable devices in the microwave range. The devices show signal attenuation at the resonance frequency which is increased more than −20 dB compared with a microstrip line without any magnetic material. At ferromagnetic resonance the power loss in the nanorod structure was 15% higher than that of a Permalloy based device. In the pass-band frequency region the signal attenuation/insertion loss of the nanorod arrays was about 2 dB higher than that of the Permalloy film. It is observed that to get good noise suppression, the sig... |
| Databáze: | OpenAIRE |
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