Thin-film RF noise suppressor integrated in a transmission line

A polyester nonwoven textile with Ni-based alloy coating was fabricated, and the effect of electromagnetic wave shielding was evaluated. The Ni-based was coated by electroless plating on the textile. The electromagnetic wave shielding effect of the textile with Ni-B coating was about 99.98% over the induction range of 6-13 GHz. Because the textile has thin, light, flexible, and breathable characteristics, it will be versatile for the various electromagnetic wave shielding applications.Index Terms-Electroless palting, electromagnetic wave shielding, metallic magnetic material, Ni-based alloy, polyester nonwoven textile.

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“…sandwiched between the waveguide components was connected to the S-parameter test set. SE was calculated with the following equation [4]:…”

Section: Table II Electroless Plating Conditions Of Ni-based Alloymentioning

confidence: 99%

Development of an Electromagnetic Wave Shielding Textile by Electroless Ni-Based Alloy Plating

Sonehara

Noguchi²,

Kurashina³

et al. 2009

IEEE Trans. Magn.

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“…integrated inductors [3]- [5]), integrated electromagnetic noise countermeasures [6], and sensing [7]- [8].…”

Section: Introductionmentioning

confidence: 99%

Novel enhanced-thickness magnetic nanoparticle thin-films for system-on-chip (SOC) wireless applications

Doo

Pan

et al. 2008

2008 IEEE MTT-S International Microwave Symposium Digest

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Abstract-In this paper, the propagation characteristics of an enhanced-thickness magnetic nanoparticle thin film are investigated on high resistivity silicon substrate (10,000 ohm-cm) for the first time up to 60 GHz. Contrary to other thin films, this nanoparticle thin film can achieve a thickness up to several hundred nanometers, even to micron. The enhanced thickness of this thin film is achieved by repeated coating of CoFe 2 O 4 and poly, thus providing the thin film with the high permeability capable of potential practical wireless applications. Finite Ground Coplanar (FGC) waveguides are fabricated and characterized on silicon with the novel thin film. The measured attenuation and effective dielectric/magnetic constant are reported. Results show that the FGC waveguides with the thin film feature a lower attenuation compared to those on silicon for frequencies higher than 18 GHz. The extracted relative permeability has a value of 68 by matching of the effective dielectric/magnetic constant between simulation and measurement.

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“…In this study, a Mn-Ir/Fe-Si exchange-coupled multilayer film has been proposed as a ferromagnetic resonance (FMR) absorption material for the wideband noise filter 1,2 . Since the exchange bias magnetic field H ex is introduced to the ferromagnetic Fe-Si layers by the effect of Mn-Ir/Fe-Si exchange coupling, the FMR frequency of the Fe-Si layer can be written using the following equation,…”

Section: Introductionmentioning

confidence: 99%

Mn – Ir ∕ Fe – Si exchange-coupled multilayer film with plural ferromagnetic resonance absorptions for wideband noise filter

Sonehara

Ishikawa

Sugiyama

et al. 2006

Journal of Applied Physics

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Mn-Ir/Fe-Si exchange-coupled multilayer films for a wideband and GHz band noise filter are fabricated and evaluated. The Fe-Si film has characteristics of high saturation magnetization of 19 kG, low magnetostriction of the order of 10 -6 and high resistivity of 73 µΩ･cm. When the exchange bias magnetic field is introduced to the Fe-Si layers by the effect of Mn-Ir/Fe-Si exchange-coupling, the ferromagnetic resonance (FMR) frequency of the multilayer film is higher than the natural frequency of the single Fe-Si film. In addition, the multilayer film which has different thickness in each Fe-Si layer has plural FMR frequencies. The multiple FMR frequency gives the films characteristic of wideband energy absorption. The FMR absorption bandwidth of the multilayer film which has three FMR frequencies is about three times wider than that of single FMR film. Therefore, the multilayer film with plural FMR frequencies has an advantage in wideband noise absorption and will be useful material for the wideband and GHz frequency range noise filterings.

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Thin-film RF noise suppressor integrated in a transmission line

Cited by 64 publications

References 4 publications

Development of an Electromagnetic Wave Shielding Textile by Electroless Ni-Based Alloy Plating

Development of an Electromagnetic Wave Shielding Textile by Electroless Ni-Based Alloy Plating

Novel enhanced-thickness magnetic nanoparticle thin-films for system-on-chip (SOC) wireless applications

Mn – Ir ∕ Fe – Si exchange-coupled multilayer film with plural ferromagnetic resonance absorptions for wideband noise filter

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