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Self-biased low loss conductor featured with skin effect suppression for high quality RF passives

Iramnaaz, I ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1109/TMAG.2012.2200660
  3. Publisher: IEEE , 2012
  4. Abstract:
  5. We present experimental data for artificial metaconductors exhibiting skin effect suppression at microwave frequencies. The metaconductor consists of a stack comprising twelve periods of alternating ferromagnetic (Permalloy) and normal metal (Cu) layers. Near the effective antiferromagnetic resonant frequency the average in-plane magnetic permeability of the stack approaches zero, leading to an increase in the skin depth. Compared to a Cu-based device, up to 70% loss reduction has been achieved by a metaconductor based coplanar wave guide at ∼ 10 GHz without changing the propagation wavelength. Moreover, unlike conventional magnetic devices, no external magnetic bias is required due to the large magnetic anisotropy present in the ferromagnetic layers
  6. Keywords:
  7. Coplanar wave guide ; Ferromagnetic resonance ; Magnetic thin film ; Metamaterial ; Radio frequency ; Antiferromagnetics ; Cu-based ; Ferromagnetic layers ; High quality ; Loss reduction ; Magnetic bias ; Normal metals ; Radio frequencies ; RF passives ; Self-biased ; Skin depth ; Antiferromagnetism ; Electric conductors ; Ferromagnetic materials ; Ferromagnetism ; Gyrators ; Magnetic devices ; Magnetic permeability ; Magnetic thin films ; Metamaterials ; Natural frequencies
  8. Source: IEEE Transactions on Magnetics ; Volume 48, Issue 11 , 2012 , Pages 4139-4142 ; 00189464 (ISSN)
  9. URL: http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6333053&url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel5%2F20%2F6332554%2F06333053.pdf%3Farnumber%3D6333053