Shielding Effectiveness Measurement Method for Planar Nanomaterial Samples Based on CNT Materials up to 18 GHz

Amaro, Andrea; Suarez, Adrian; Torres, J.; Martínez, P.A.; Herraiz, Roberto; Alcarria, Antonio; Benedito, Adolfo; Ruiz, Rocío; Galvez-Hernandez, Pedro; Penades, Antonio

doi:10.3390/magnetochemistry9050114

Cited by 8 publications

(5 citation statements)

References 35 publications

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“…Magnetic materials predominantly cause absorption due to loss in EM energy by hysteresis, eddy current, polarization, and ferromagnetic losses. 26 Generally, more than one mechanism is involved in absorption-based EMI shielding. 27 Absorption-dominated shielding of EM radiation is achieved by designing nanocomposites (NCs) with controlled magnetic and dielectric loss to produce high attenuation.…”

Section: Emi Shielding By Absorptionmentioning

confidence: 99%

“…The absorption of EM radiation is based on the absorption of the electric field due to the dielectric loss that occurs in the shielding material or due to the hysteresis, resonance, and eddy current losses in the material. Magnetic materials predominantly cause absorption due to loss in EM energy by hysteresis, eddy current, polarization, and ferromagnetic losses 26 . Generally, more than one mechanism is involved in absorption‐based EMI shielding 27 .…”

Section: Mechanism Of Emi Shieldingmentioning

confidence: 99%

“…In addition to these methods, there are also non‐standardized methods to measure the EMI SE. Amaro et al 26 proposed an absorber box method to overcome the disadvantages of ASTM D4935‐18 and IEEE 229 standard methods. All these methods use either a scalar network analyzer/vector network analyzer (VNA).…”

Section: Characterization Techniques Of Ep Ncs Used For Emi Shieldingmentioning

confidence: 99%

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Review on recent progress in epoxy‐based composite materials for Electromagnetic Interference(EMI) shielding applications

Albert,

Parthasarathy,

Kumar

2023

Polymer Composites

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The densely packed electronic components in electronic devices emit electromagnetic (EM) radiations, and the interaction of the emitted EM radiations with external EM signals of neighboring components leads to device malfunctions and also creates health issues in human beings. Particularly, in aircraft, EM interference is a serious threat that leads to disastrous outcomes. The shielding of electronic components is an ideal way to reduce the pollution of electromagnetic interference (EMI). The mechanism of EMI shielding efficiency is discussed elaborately in this article. The factors associated with the EMI shielding of materials are discussed in detail. The EMI shielding by reflection and absorption are two possible routes to improve the shielding performance of the shielding materials. This article also highlights the EMI shielding mechanisms by reflection and absorption. However, the risk of secondary EM pollution is associated with the reflection of EM waves. This review also outlines the methods to improve the absorption‐based shielding performance of the materials. The significance of the microstructure of the shielding materials in enhancing the absorption‐dominant shielding efficiency is also presented with a detailed analysis. This helps to fabricate the absorption‐dominant EMI shielding materials with suitable microstructures. The EM loss is associated with the magnetic, dielectric, and conduction losses according to EM theory.Highlights This article highlights the recent progress in epoxy‐based EMI shielding materials. EMI shielding mechanisms by reflection and absorption are discussed elaborately. Reviewed the methods to improve the absorption‐based shielding performance in detail. Materials with EMI shielding efficiency greater than 30 dB are highly preferable.

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Section: Emi Shielding By Absorptionmentioning

confidence: 99%

Section: Mechanism Of Emi Shieldingmentioning

confidence: 99%

Section: Characterization Techniques Of Ep Ncs Used For Emi Shieldingmentioning

confidence: 99%

See 1 more Smart Citation

Review on recent progress in epoxy‐based composite materials for Electromagnetic Interference(EMI) shielding applications

Albert,

Parthasarathy,

Kumar

2023

Polymer Composites

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“…To this aim, different kinds of test methodologies are reported in the scientific literature. In [ 28 ], the shielding effectiveness of planar materials has been measured by means of a method based on the ASTM D4935-18 standard [ 29 ]. It exploits an absorber box which mitigates the known issues of the ASTM D4935-18 standard.…”

Section: Introductionmentioning

confidence: 99%

Development of a Simple Setup to Measure Shielding Effectiveness at Microwave Frequencies

Cardillo,

Carcione,

Ferro

et al. 2024

Sensors

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Testing the shielding effectiveness of materials is a key step for many applications, from the industrial to the biomedical field. This task is very relevant for high-sensitivity sensors, whose performance can be greatly affected by electromagnetic fields. However, the available testing procedures often require expensive, bulky, and heavy measurement chambers. In this paper, a cost-effective and reliable measurement procedure for testing the shielding effectiveness of materials is proposed. It exploits a lab-scale anechoic shielded chamber, which is lightweight, compact, and cost-effective if compared to the available commercial solutions. The measurement procedure employs a vector network analyzer to allow an accurate and fast characterization setup. The chamber realization phases and the measurement procedure are described. The shielding capability of the chamber is measured up to 26 GHz, whereas the performance of commercial shielding coatings is tested to demonstrate the measurement’s effectiveness.

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“…Andrea Amaro et al discuss the "Shielding Effectiveness Measurement Method for Planar Nanomaterial Samples Based on Carbon Nanotubes (CNT) Materials up to 18 GHz" [22]. The proposed measurement methodology demonstrates significant advantages, including the simplicity of the sample machining, which means that very specific geometries or tiny dimensions are not required.…”

mentioning

confidence: 99%

Magnetic Materials, Thin Films and Nanostructures

Constantinescu

Petrescu

2023

Magnetochemistry

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In this first volume, we cover relevant aspects of chemical and physical processes of the production and characterization of magnetic materials in bulk, thin films, nanostructures, and/or nanocomposites, as well as modeling aspects involving such structures. Accordingly, this volume presents eleven original research and review works on the challenges and trends covering fundamental and experimental work, with a special focus on the design, synthesis, and characterization of various types of magnetic materials, and the study of their structure–property relationships. State-of-the-art results on the development of new experimental concepts, leading to the transfer, chemical transformation, and high-resolution patterning of advanced thin films and nanomaterials, and to the design and fabrication of devices, are also presented and discussed.

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Shielding Effectiveness Measurement Method for Planar Nanomaterial Samples Based on CNT Materials up to 18 GHz

Cited by 8 publications

References 35 publications

Review on recent progress in epoxy‐based composite materials for Electromagnetic Interference(EMI) shielding applications

Review on recent progress in epoxy‐based composite materials for Electromagnetic Interference(EMI) shielding applications

Development of a Simple Setup to Measure Shielding Effectiveness at Microwave Frequencies

Magnetic Materials, Thin Films and Nanostructures

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