Metal-embedded matrices for EMI shielding

Jagatheesan, Krishnasamy; Thilagavathi, G.; Alagirusamy, R.; Das, Apurba

doi:10.1016/b978-0-12-817590-3.00007-5

Cited by 5 publications

(3 citation statements)

References 28 publications

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“…Targets can be aircraft, ships, spacecraft, vehicles, people, and the natural environment that reflects the return signal. Based on the reflected signal, the object's angle, distance, or velocity can be determined [14]. But sometimes the reflected signal cannot be detected.…”

Section: The Aim and Objectives Of The Studymentioning

confidence: 99%

An analysis of effect of water hyacinth carbonization temperature on fabrication and EMI shielding radar

Imammuddin

Suparman

Suprapto

et al. 2021

EEJET

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The need to increase the ability of water hyacinth composites as EMI radar protection is related to the carbonization process of organic materials. This research aimed to determine the effect of water hyacinth carbonization temperature on the effectiveness of fabrication and EMI shielding radar. The research method includes the preparations such as cutting, washing, and drying the water hyacinth. The drying process is carried out using an oven with a temperature of 70 °C for 4 days. Then the water hyacinth is mashed until it reaches the 80 mesh size. Then the carbonization process is carried out, with variations in carbonization temperature ranging from 500 °C, 600 °C, 700 °C, 800 °C, 900 °C and 1,000 °C, with a heat increase speed of 3 °C/minutes. After reaching the specified temperature, a holding time is then carried out for 1 hour. Furthermore, the composite composition of 30 % water hyacinth activated carbon powder and 70 % phenol-formaldehyde (PF) resin was molded using a hot press with a pressure of 300 kg/cm2 at 180 °C for 10 minutes. The results showed that the water hyacinth composite could be used as an EMI protection material at the X-Band frequency (8–12.5 GHz). Where the electrical conductivity and EMI SE increases with increasing carbonization temperature. Water hyacinth composites at a carbonization temperature of 1,000 °C showed the highest electrical conductivity and the highest EMI SE, respectively 4.64∙10-2 S/cm and 41.15 dB (attenuation 99.99 %) at a frequency of 8 GHz. The high absorption contribution is associated with the synergy combination of KCl and the pore structure of the goitre. KCl contributes to the magnetic properties and pore structure with high electrical conductivity values

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Section: The Aim and Objectives Of The Studymentioning

confidence: 99%

An analysis of effect of water hyacinth carbonization temperature on fabrication and EMI shielding radar

Imammuddin

Suparman

Suprapto

et al. 2021

EEJET

View full text Add to dashboard Cite

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“…It includes a range of electromagnetic waves with relatively high frequencies and shorter wavelengths compared to radio waves and lower-frequency signals. This range includes L-band (1-2 GHz), S-band (2-4 GHz), C-band (4-8 GHz), X-band (8-12 GHz) and partial Ku-band (12)(13)(14)(15)(16)(17)(18). These bands are used for telecommunications (communication systems, microwave links, satellite communication, radar systems etc.…”

Section: Introductionmentioning

confidence: 99%

“…EMI shielding can be provided by using metallic products, such as copper, silver, iron, nickel, etc., that have reflectiveness due to high electrical conductivity [12,13]. When metals are used for these applications, some characteristics such as high density, poor corrosion resistance and forming difficulty must be dealt with [14].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Dielectric Properties of Graphite and Carbon Black-Filled Composites as Electromagnetic Interference Shielding Coatings

2023

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The main purpose of electromagnetic interference (EMI) shielding coatings is the insulation of sensitive devices and protect people from electromagnetic field exposure due to its effects on the human body. This paper investigates the dielectric properties, and electromagnetic shielding performances of graphite and carbon black (CB) filled epoxy matrix composites produced by the mechanical mixing method. The sample compositions were created at rates ranging from 1 to 7 wt%. Samples were analyzed by Vector Network Analyzer (VNA) using the coaxial method in the range of 1–14 GHz, including L band, S band, C band, X band and partially Ku band. After determining the scattering parameters with VNA, AC conductivity, absorption, reflection and total shielding efficiency values were calculated. At high frequencies, almost all the samples showed higher AC conductivity. CB-filled samples show higher AC conductivity than graphite-filled samples. The total shielding efficiency (SET) of the graphite-added samples (19–21 dB) is slightly higher than the carbon black-added samples (8–17 dB). Distinct filling ratios in graphite-added samples result in closer shielding behavior in contrast to carbon black-added samples. However, higher shielding efficiency is observed as the CB filler ratio increases. The shielding efficiencies of the samples with both types of filling materials vary little depending on the frequency. Reflection is the main mechanism of the shielding efficiency, which constitutes the majority of total efficiency for all types of samples.

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Electromagnetic interference (EMI) shielding effectiveness (SE) of pure aluminum: an experimental assessment for 5G (SUB 6GHZ)

Sorgucu

2023

J Mater Sci: Mater Electron

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Metal-embedded matrices for EMI shielding

Cited by 5 publications

References 28 publications

An analysis of effect of water hyacinth carbonization temperature on fabrication and EMI shielding radar

An analysis of effect of water hyacinth carbonization temperature on fabrication and EMI shielding radar

Investigation of the Dielectric Properties of Graphite and Carbon Black-Filled Composites as Electromagnetic Interference Shielding Coatings

Electromagnetic interference (EMI) shielding effectiveness (SE) of pure aluminum: an experimental assessment for 5G (SUB 6GHZ)

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