TY - GEN
T1 - High-performance laminated thin-film shield with conductors and magnetic material multilayer
AU - Yamada, Keiju
AU - Ishida, Masaaki
AU - Yutaka, Shimada
AU - Yamaguchi, Masahiro
PY - 2011
Y1 - 2011
N2 - This paper presents a laminated shield consisting of conductors and a magnetic material multilayer. The laminated shield provides a high shielding performance in an ultrahigh-frequency (UHF) band because the magnetic materials have high permeability and multi reflection occurs in the shield. Furthermore, the shielding performance is enhanced at the ferromagnetic resonance (FMR) frequency of the magnetic materials because the magnitude of complex permeability is maximized owing to the large imaginary part of permeability. We examined the shielding mechanisms of the laminated shield and a conductor shield by impedance calculation. The shielding performance obtained by impedance calculation coincides with that obtained by finite element method (FEM) simulation. The laminated shield is fabricated using a CoNbZr thin-film layer with a thickness of 0.2 m and two Cu layers with a thickness of 0.4 m. The measured shield effectiveness of the laminated thin-film shield is 27 dB higher than that of the conductor shield at a frequency of 470 MHz, which is similar to the results of impedance calculation and FEM simulation.
AB - This paper presents a laminated shield consisting of conductors and a magnetic material multilayer. The laminated shield provides a high shielding performance in an ultrahigh-frequency (UHF) band because the magnetic materials have high permeability and multi reflection occurs in the shield. Furthermore, the shielding performance is enhanced at the ferromagnetic resonance (FMR) frequency of the magnetic materials because the magnitude of complex permeability is maximized owing to the large imaginary part of permeability. We examined the shielding mechanisms of the laminated shield and a conductor shield by impedance calculation. The shielding performance obtained by impedance calculation coincides with that obtained by finite element method (FEM) simulation. The laminated shield is fabricated using a CoNbZr thin-film layer with a thickness of 0.2 m and two Cu layers with a thickness of 0.4 m. The measured shield effectiveness of the laminated thin-film shield is 27 dB higher than that of the conductor shield at a frequency of 470 MHz, which is similar to the results of impedance calculation and FEM simulation.
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U2 - 10.1109/ISEMC.2011.6038350
DO - 10.1109/ISEMC.2011.6038350
M3 - Conference contribution
AN - SCOPUS:80054735094
SN - 9781424447831
T3 - IEEE International Symposium on Electromagnetic Compatibility
SP - 432
EP - 437
BT - EMC 2011 - Proceedings
T2 - 2011 IEEE International Symposium on Electromagnetic Compatibility, EMC 2011
Y2 - 14 August 2011 through 19 August 2011
ER -