Effect of Complex Permeability on Circuit Parameters of CPW with Magnetic Noise Suppression Sheet

Sho MUROGA  Motoshi TANAKA  Takefumi YOSHIKAWA  Yasushi ENDO  

IEICE TRANSACTIONS on Communications   Vol.E103-B   No.9   pp.899-902
Publication Date: 2020/09/01
Publicized: 2020/04/08
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2019MCP0002
Type of Manuscript: Special Section PAPER (Special Section on Electromagnetic Compatibility in Conjunction with EMC Sapporo and APEMC 2019)
Electromagnetic compatibility,  electromagnetic noise suppressor,  magnetic film,  ferromagnetic resonance loss,  magnetic circuit,  

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An effect of complex permeability of noise suppression sheets (NSS) on circuit parameters was investigated by a magnetic circuit analysis using cross-sectional size and material parameters. The series resistance and inductance of the coplanar waveguide (CPW) with a NSS considering the effect of the complex permeability of the NSS were quantitatively estimated. The result indicated that the imaginary and real part of the effective permeability affected the resistance and inductance, respectively. Furthermore, this analysis was applied to an 8-µm-wide CPW with a 0.5-µm-thick Co85Zr3Nb12 film for quantitative estimation of the resistance, the inductance and the characteristic impedance. The estimated parameters were almost similar to the measured values. These results showed that the frequency characteristics of the circuit parameters could be controlled by changing size and material parameters.