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Self-Biased Low Loss Conductor Featured With Skin Effect Suppression for High Quality RF Passives

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5 Author(s)
I. Iramnaaz$^{1}$ Department of Electrical Engineering,, Wright State University,, Dayton,, OH, USA ; H. Schellevis ; B. Rejaei ; R. Fitch
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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.

Published in:

IEEE Transactions on Magnetics  (Volume:48 ,  Issue: 11 )