EMI shielding: Methods and materials—A review

Geetha, S.; Kumar, K.K. Satheesh; Rao, C. Raghavendra; Vijayan, M.; Trivedi, D.C.

doi:10.1002/app.29812

Cited by 926 publications

(544 citation statements)

References 81 publications

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“…Recent functionalities in microelectronic have induced an increasing development of new materials within integrated circuit (IC) and particular systems to characterize them [1,2]. The radiated emission or immunity of a device are estimated either in time domain [3] or frequency domain.…”

Section: Physical Context and Problem Statementmentioning

confidence: 99%

Microwave microscopy applied to EMC problem: Visualisation of electromagnetic field in the vicinity of electronic circuit and effect of nanomaterial coating

Rossignol¹,

Stuerga²,

Bailly³

et al. 2017

AEM

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This proposal is devoted to a collaborative approach dealing with microwave microscopy experiments. The application is dedicated to an electromagnetic field cartography above circuits and the influence of nanometric material layer deposition on the circuits. The first application is associated to a microstrip ring resonator. The results match with the simulated fields. The second application is focused on the effects of a dielectric layer deposited on the circuit and its impact in terms of electromagnetic propagation.

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Section: Physical Context and Problem Statementmentioning

confidence: 99%

Microwave microscopy applied to EMC problem: Visualisation of electromagnetic field in the vicinity of electronic circuit and effect of nanomaterial coating

Rossignol¹,

Stuerga²,

Bailly³

et al. 2017

AEM

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“…It is also obvious that the electromagnetic shielding is vital in military applications. [13][14][15] Shielding effectiveness is the ratio of impinging energy to the residual energy. When an electromagnetic wave passes through a shield, absorption and reflection take place.…”

Section: Electromagnetic-shielding Effectivenessmentioning

confidence: 99%

“…The residual energy is part of the remaining energy that is neither reflected nor absorbed by the shield, but emerges from the shield. Shielding effectiveness (SE) is the ratio of the field before and after attenuation of the electric and magnetic fields and can be expressed as Equation (1): 15,16 [ ]…”

Section: Electromagnetic-shielding Effectivenessmentioning

confidence: 99%

Electromagnetic-shielding effectiveness and fracture behavior of laminated (Ni–NiAl3) composites

Yener¹,

Yener²,

Zeytin³

2016

Mater. Tehnol.

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In this research Ni-NiAl3 multilayer composites were produced through reactive sintering in an open atmosphere using Ni and Al foils with a 250-μm initial thickness. The sintering was performed at 700°C under 2 MPa of pressure for 6 h. The microstructure and phase characterizations of the samples were performed. The hardness values of samples were determined using the Vickers indentation technique for the intermetallic and metallic regions as 765±60 HV and 90±10 HV, respectively. For the mechanical examinations, a perpendicular load was applied to the composite in order to observe the fracture behavior of the metallic-intermetallic laminate composites. SEM fracture surface analyses indicated that cracks initiated in the intermetallic region, and the crack propagation stopped when it reaches the ductile nickel phase. In addition, shielding-effectiveness measurements were performed. The MIL composite exhibits over 50 dB electromagnetic-shielding effectiveness against a very wide frequency range, from a few GHz to over 18 GHz. Keywords: intermetallics, MIL composites, fracture behavior, electromagnetic interference shielding V raziskavi so bili izdelani Ni-NiAl3 ve~plastni kompoziti z reakcijskim sintranjem na atmosferi in z uporabo Ni-in Al-folij z za~etno debelino 250 μm. Sintranje je bilo 6 h na 700°C, pri tlaku 2 MPa. Na vzorcih je bila izvedena karakterizacija mikrostrukture in faz. Trdota vzorcev je bila dolo~ena po Vickersu, 765±60 HV, za podro~ja intermetalnih faz in 90±10 HV pri osnovi. Za mehanske preiskave je bila uporabljena navpi~na obremenitev, za opazovanje obna{anja kompozita pri lomljenju kovinskih in intermetalnih lamel. SEM-preiskave prelomov so pokazale, da je za~etek razpoke v podro~ju intermetalne faze in da se {irjenje razpoke ustavi, ko pride v duktilno fazo niklja. Izvedene so bile tudi meritve u~inkovitosti za{~ite sevanja. MIL kompozit ka`e u~inkovitost pred elektromagnetnim sevanjem, vi{jo od 50 dB v zelo {irokem obmo~ju frekvenc od nekaj GHz do preko 18 GHz. Klju~ne besede: intermetalne zlitine, MIL kompoziti, obna{anje pri lomu, elektromagnetna interferen~na za{~ita

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“…A is the absorption loss, R is the reflection loss, and B is the multiple reflection loss. SE changes according to the shielding material and frequency [5][6][7][8].…”

Section: Shielding Effectivenessmentioning

confidence: 99%

Characteristics simulation of wireless power transfer system considering shielding distance

Lee¹,

Choi²,

Jung³

et al. 2015

Progress in Superconductivity and Cryogenics

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Wireless power transfer technology is using the magnetic resonance recently drawing increased attention. It uses the resonance between transmitter and receiver coils to transfer power. Thus, it can improve the transfer distance and efficiency compared with the existing magnetic induction technique. The authors found from the previous study that the application of the superconductor coil to the magnetic resonance wireless power transfer system improved its efficiency. Its application to real life, however, requires the additional study on the effects of adjacent materials. In this study, the two resonance coils made by superconductor coils were used to aluminum and plastic shielding materials was placed between the coils. S-parameters were analyzed according to the position of the shielding material between the transmitter and receiver coils. As a result, the plastic of shielding material had no effect, but the aluminum of shielding material affected the wireless power transfer due to the shielding effectiveness.

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EMI shielding: Methods and materials—A review

Cited by 926 publications

References 81 publications

Microwave microscopy applied to EMC problem: Visualisation of electromagnetic field in the vicinity of electronic circuit and effect of nanomaterial coating

Microwave microscopy applied to EMC problem: Visualisation of electromagnetic field in the vicinity of electronic circuit and effect of nanomaterial coating

Electromagnetic-shielding effectiveness and fracture behavior of laminated (Ni–NiAl3) composites

Characteristics simulation of wireless power transfer system considering shielding distance

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